Dramatic improvements in survival have been achieved for children and adolescents with cancer. Between 1975 and 2020, childhood cancer mortality decreased by more than 50%.[1-3] Childhood and adolescent cancer survivors require close monitoring because cancer therapy side effects may persist or develop months or years after treatment. For information about the incidence, type, and monitoring of late effects in childhood and adolescent cancer survivors, see Late Effects of Treatment for Childhood Cancer.

Pediatric soft tissue sarcomas are a heterogenous group of malignant tumors that originate from primitive mesenchymal tissue and account for 6% of all childhood tumors (rhabdomyosarcomas, 3%; other soft tissue sarcomas, 3%).[2] For more information, see the Histopathological Classification of Childhood Soft Tissue Sarcoma section.

Rhabdomyosarcoma, a tumor of striated muscle, is the most common soft tissue sarcoma in children. It accounts for 50% of the soft tissue sarcomas in children aged 0 to 14 years.[2] For more information, see Childhood Rhabdomyosarcoma Treatment.

In pediatrics, the remaining soft tissue sarcomas are commonly referred to as nonrhabdomyosarcomatous soft tissue sarcomas (NRSTS) and account for approximately 3.5% of all childhood tumors.[2,4] This summary discusses the treatment of NRSTS.

NRSTS are often classified according to the normal tissue types from which they are derived. These types include various connective tissues, peripheral nervous system tissue, smooth muscle tissue, and vascular tissue. The classification also includes undifferentiated tumors that are not clearly related to specific tissue types. For more information about vascular tumors in children, see Childhood Vascular Tumors Treatment.

Incidence of Soft Tissue Sarcoma by Age and Histology

The distribution of soft tissue sarcomas by histology and age, on the basis of the Surveillance, Epidemiology, and End Results (SEER) Program information from 2000 to 2015, is depicted in Table 1. The distribution of histological subtypes by age is also shown in Figure 2.

Table 1. Age Distribution of Soft Tissue Sarcomas in Children Aged 0 to 19 Years (SEER 2000–2015)a

		Age <5 y	Age 5–9 y	Age 10–14 y	Age 15–19 y	Age <20 y	All Ages (Including Adults)
pPNET = peripheral primitive neuroectodermal tumors; SEER = Surveillance, Epidemiology, and End Results.
aSource: SEER database.[5]
All soft tissue and other extraosseous sarcomas		1,124	773	1,201	1,558	4,656	80,269
Rhabdomyosarcomas		668	417	382	327	1,794	3,284
Fibrosarcomas, peripheral nerve, and other fibrous neoplasms		137	64	112	181	494	6,645
	Fibroblastic and myofibroblastic tumors	114	33	41	77	265		4,228
	Nerve sheath tumors	23	31	70	102	226		2,303
	Other fibromatous neoplasms	0	0	1	2	3		114
Kaposi sarcoma		2	1	2	10	15	7,722
Other specified soft tissue sarcomas		237	238	559	865	1,899	49,004
	Ewing tumor and Askin tumor of soft tissue	37	36	72	113	258		596
	pPNET of soft tissue	24	23	42	56	145		402
	Extrarenal rhabdoid tumor	75	8	9	4	96		205
	Liposarcomas	4	6	37	79	126		10,749
	Fibrohistiocytic tumors	43	73	142	223	481		13,531
	Leiomyosarcomas	11	14	19	41	85		14,107
	Synovial sarcomas	12	39	141	210	402		2,608
	Blood vessel tumors	12	9	11	32	64		4,238
	Osseous and chondromatous neoplasms of soft tissue	1	6	16	14	37		1,018
	Alveolar soft parts sarcoma	4	5	22	33	64		211
	Miscellaneous soft tissue sarcomas	14	19	48	60	141		1,339
Unspecified soft tissue sarcomas		80	53	146	175	454	13,614

Soft tissue sarcomas include both rhabdomyosarcomas and NRSTS. NRSTS are more common in adolescents and adults.[6] Most of the information regarding treatment and natural history of the disease in younger patients has been based on studies in adult patients. The distributions of soft tissue sarcomas by age according to stage (Figure 1), histological subtype (Figure 2), and tumor site (Figure 3) are shown below.[7]

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Prognosis and Prognostic Factors

The prognosis of NRSTS varies greatly depending on the following factors:[71-73]

• Site of the primary tumor.
• Tumor size.
• Tumor grade. For more information, see the Soft Tissue Sarcoma Tumor Pathological Grading System section.
• Tumor histology.
• Depth of tumor invasion.
• Presence of metastases and site of the metastatic tumor.
• Resectability of the tumor.
• Use of radiation therapy.

In a review of a large adult series of NRSTS, patients with superficial extremity sarcomas had a better prognosis than did patients with deep tumors. This may be a reflection of differences in resectability. Thus, in addition to grade and size, the depth of invasion of the tumor should be considered.[74]

Data specific to NRSTS in children and adolescents are difficult to separate. Several adult and pediatric series have shown that patients with large or invasive tumors have a significantly worse prognosis than do those with small, noninvasive tumors. A retrospective review of soft tissue sarcomas (rhabdomyosarcoma and NRSTS) in children and adolescents suggests that the 5-cm cutoff used for adults with soft tissue sarcoma may not be ideal for smaller children, especially infants. The review identified an interaction between tumor diameter and body surface area.[75] This relationship has been questioned in a rhabdomyosarcoma study and requires further study to determine the therapeutic implications of the observation.[76]

Some pediatric NRSTS are associated with a better outcome. For instance, patients with infantile fibrosarcoma who present at age 4 years or younger have an excellent prognosis. This excellent outcome occurs because surgery alone can cure a significant number of these patients and infantile fibrosarcoma is highly chemosensitive. This tumor also responds well to larotrectinib, a specific tropomyosin receptor kinase inhibitor.[22,77]

Prognosis based on the Children's Oncology Group (COG) ARST0332 trial

Soft tissue sarcomas in older children and adolescents often behave similarly to those in adult patients.[22,78] A large, prospective, multinational COG study (ARST0332 [NCT00346164]) enrolled newly diagnosed patients younger than 30 years. Patients were assigned to treatment based on their risk group. Risk groups were defined by the presence of metastasis, tumor resectability and margins, and tumor size and grade. For more information, see Figure 4.[79][Level of evidence B4]

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Each patient was assigned to one of three risk groups and one of four treatment groups. The risk groups were as follows:[79]

1. Low risk: Nonmetastatic R0 (resection was complete with negative microscopic margins) or R1 (microscopically positive margins) low-grade tumor, or ≤5 cm R1 high-grade tumor.
2. Intermediate risk: Nonmetastatic R0 or R1 >5 cm high-grade tumor, or unresected tumor of any size or grade.
3. High risk: Metastatic tumor.

The treatment groups were as follows:

1. Surgery alone (n = 205).
2. Radiation therapy (55.8 Gy) (n = 17).
3. Chemoradiation therapy (chemotherapy and 55.8 Gy radiation therapy) (n = 111).
4. Neoadjuvant chemoradiation therapy (chemotherapy and 45 Gy radiation therapy, then surgery and radiation therapy boost based on margins with continued chemotherapy) (n = 196).

Chemotherapy included six cycles of ifosfamide (3 g/m2 per dose) given intravenously on days 1 through 3 and five cycles of doxorubicin (37.5 mg/m2 per dose) given intravenously on days 1 to 2 every 3 weeks, with the sequence adjusted based on the timing of surgery or radiation therapy.

For the 550 patients enrolled, 529 evaluable patients were included in the analysis. At a median follow-up of 6.5 years (interquartile range [IQR], 4.9–7.9), the survival results are shown in Table 3.

Table 3. Survival Results for the Children's Oncology Group ARST0332 Trial

	5-Year Event-Free Survival		5-Year Overall Survival
Risk Group	Events/Patients	Estimate, % (95% CI)	Events/Patients	Estimate, % (95% CI)
CI = confidence interval; R0 = completely excised with negative microscopic margins; R1 = grossly excised but with positive microscopic margins; R2 = less than complete gross excision.
Low	26/222	88.9 (84.0–93.8)	10/222	96.2 (93.2–99.2)
Intermediate	84/227	65.0 (58.2–71.8)	55/227	79.2 (73.4–85.0)
High	63/80	21.2 (11.4–31.1)	52/80	35.5 (23.6–47.4)
Surgical Margin
R0	44/252	83.6 (78.3–89.0)	22/252	92.8 (89.1–96.5)
R1	29/81	66.2 (54.8–77.5)	17/81	79.7 (70.0–89.5)
R2	100/196	49.2 (41.4–57.0)	78/196	62.7 (55.2–70.3)

The COG ARST0332 trial was a risk-based stratification study. Overall, local control after radiation therapy was as follows: R0, 106 of 109 patients (97%); R1, 51 of 60 patients (85%); and R2/unresectable, 2 of 6 patients (33%). Local recurrence predictors included extent of delayed resection (P < .001), imaging response before delayed surgery (P < .001), histological subtype (P < .001), and no radiation therapy (P = .046). The 5-year EFS was significantly lower for patients unable to undergo R0 or R1 resection (P = .0003).[80]

Pediatric patients with unresected localized NRSTS have a poor outcome. Only about one-third of patients treated with multimodality therapy remain disease free.[71,81]; [82,83][Level of evidence C1] In an Italian review of 30 patients with NRSTS at visceral sites, only ten patients survived at 5 years. Unfavorable prognostic factors included inability to achieve complete resection, large tumor size, tumor invasion, histological subtype, and lung-pleura sites.[84][Level of evidence C1]

Prognosis based on the European paediatric Soft Tissue Sarcoma Study Group (EpSSG) NRSTS 2005 study

The EpSSG conducted a prospective trial for patients younger than 21 years with NRSTS. They reported an analysis of 206 patients with synovial sarcoma and 363 with adult-type NRSTS. Patients were treated according to assigned risk groups. For more information, see Figure 5.[85] With a median follow-up of 80 months (interquartile range, 54.3–111.3) for the 467 surviving patients, the 5-year EFS rate was 73.7% (95% CI, 69.7%–77.2%), and the OS rate was 83.8% (95% CI, 80.3%–86.7%). The survival by treatment groups are shown in Table 4.[85]

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Table 4. Survival Outcomes by Treatment Groups in the EpSSG NRSTS 2005 Study

Treatment Group	5-Year Event-Free Survival Rate (95% CI)	5-Year Overall Survival Rate (95% CI)	Local Recurrence Rate
CI = confidence interval; EpSSG = European paediatric Soft Tissue Sarcoma Study Group; NRSTS = nonrhabdomyosarcomatous soft tissue sarcomas.
Surgery alone	91.4% (87.0%–94.4%)	98.1% (95.0%–99.3%)	7.6% (19/250)
Adjuvant radiation therapy alone (n = 17)	75.5% (46.9%–90.1%)	88.2% (60.6%–96.9%)	6.7% (1/15)
Adjuvant chemotherapy ± radiation therapy (n = 93)	65.6% (54.8%–74.5%)	75.8% (65.3%–83.5%)	10.8% (7/65)
Neoadjuvant chemotherapy ± radiation therapy (n = 209)	56.4% (49.3%–63.0%)	70.4% (63.3%–76.4%)	14.2% (16/113)

Treatment failures specifically for the neoadjuvant therapy treatment groups are shown in Table 5.[85]

Table 5. Treatment Failures for Specific Neoadjuvant Therapy Groups in the EpSSG NRSTS 2005 Studya

Treatment	Local Failure (No. of Patients)	Local + Metastatic Failure (No. of Patients)	Metastatic Failure (No. of Patients)
EpSSG = European paediatric Soft Tissue Sarcoma Study Group; No. = number; NRSTS = nonrhabdomyosarcomatous soft tissue sarcomas.
aAdapted from Ferrari et al.[85]
Radiation therapy alone (n = 21)	7	2	4
Delayed surgery followed by radiation therapy (n = 104)	16	6	8
Delayed surgery alone (n = 48)	8	3	8
No local treatment (n = 16)	12	4	0
Preoperative radiation therapy followed by delayed surgery (n = 20)	4	0	6

The authors concluded that adjuvant therapy (radiation therapy and chemotherapy) could safely be omitted in the group of patients assigned to surgery alone. Their criteria included the following:[85]

• Synovial cell: Intergroup Rhabdomyosarcoma Study (IRS) group I tumor size <5 cm.
• Adult-type NRSTS: IRS group I tumor size <5 cm, any grade.
• Adult-type NRSTS: IRS group I tumor size >5 cm, tumor grade I.
• Adult-type NRSTS: IRS group II any tumor size, tumor grade I.

They also concluded that improving the outcome for patients with high-risk, initially resected, adult-type NRSTS and those with initially unresected disease remains a major clinical challenge.[85]

In a pooled analysis from U.S. and European pediatric centers, outcomes were better for patients whose tumor removal procedure was deemed complete than for patients whose tumor removal was incomplete. Outcomes were better for patients who received radiation therapy than for patients who did not.[82][Level of evidence C1]

Because long-term morbidity must be minimized while disease-free survival is maximized, the ideal therapy for each patient must be carefully and individually determined using these prognostic factors before initiating therapy.[29,86-90]

References

1. Smith MA, Altekruse SF, Adamson PC, et al.: Declining childhood and adolescent cancer mortality. Cancer 120 (16): 2497-506, 2014. [PUBMED Abstract]
2. National Cancer Institute: NCCR*Explorer: An interactive website for NCCR cancer statistics. Bethesda, MD: National Cancer Institute. Available online. Last accessed August 23, 2024.
3. Surveillance Research Program, National Cancer Institute: SEER*Explorer: An interactive website for SEER cancer statistics. Bethesda, MD: National Cancer Institute. Available online. Last accessed September 5, 2024.
4. Hawkins DS, Black JO, Orbach D, et al.: Nonrhabdomyosarcoma soft-tissue sarcomas. In: Blaney SM, Helman LJ, Adamson PC, eds.: Pizzo and Poplack's Pediatric Oncology. 8th ed. Wolters Kluwer, 2020, pp 721-46.
5. Surveillance, Epidemiology, and End Results (SEER) Program: SEER*Stat Database: Incidence - SEER 18 Regs Research Data + Hurricane Katrina Impacted Louisiana Cases, Nov 2017 Sub (1973-2015 varying) - Linked To County Attributes - Total U.S., 1969-2016 Counties [Database]. National Cancer Institute, DCCPS, Surveillance Research Program, released April 2018, based on the November 2017 submission. Available online. Last accessed October 12, 2022.
6. Weiss SW, Goldblum JR: General considerations. In: Weiss SW, Goldblum JR: Enzinger and Weiss's Soft Tissue Tumors. 5th ed. Mosby, 2008, pp 1-14.
7. Ferrari A, Sultan I, Huang TT, et al.: Soft tissue sarcoma across the age spectrum: a population-based study from the Surveillance Epidemiology and End Results database. Pediatr Blood Cancer 57 (6): 943-9, 2011. [PUBMED Abstract]
8. Chang F, Syrjänen S, Syrjänen K: Implications of the p53 tumor-suppressor gene in clinical oncology. J Clin Oncol 13 (4): 1009-22, 1995. [PUBMED Abstract]
9. Plon SE, Malkin D: Childhood cancer and hereditary. In: Pizzo PA, Poplack DG, eds.: Principles and Practice of Pediatric Oncology. 7th ed. Lippincott Williams and Wilkins, 2015, pp 13-31.
10. Groen EJ, Roos A, Muntinghe FL, et al.: Extra-intestinal manifestations of familial adenomatous polyposis. Ann Surg Oncol 15 (9): 2439-50, 2008. [PUBMED Abstract]
11. Kleinerman RA, Tucker MA, Abramson DH, et al.: Risk of soft tissue sarcomas by individual subtype in survivors of hereditary retinoblastoma. J Natl Cancer Inst 99 (1): 24-31, 2007. [PUBMED Abstract]
12. Wong JR, Morton LM, Tucker MA, et al.: Risk of subsequent malignant neoplasms in long-term hereditary retinoblastoma survivors after chemotherapy and radiotherapy. J Clin Oncol 32 (29): 3284-90, 2014. [PUBMED Abstract]
13. Eaton KW, Tooke LS, Wainwright LM, et al.: Spectrum of SMARCB1/INI1 mutations in familial and sporadic rhabdoid tumors. Pediatr Blood Cancer 56 (1): 7-15, 2011. [PUBMED Abstract]
14. Weiss SW, Goldblum JR: Benign tumors of peripheral nerves. In: Weiss SW, Goldblum JR: Enzinger and Weiss's Soft Tissue Tumors. 5th ed. Mosby, 2008, pp 825-901.
15. deCou JM, Rao BN, Parham DM, et al.: Malignant peripheral nerve sheath tumors: the St. Jude Children's Research Hospital experience. Ann Surg Oncol 2 (6): 524-9, 1995. [PUBMED Abstract]
16. Stark AM, Buhl R, Hugo HH, et al.: Malignant peripheral nerve sheath tumours--report of 8 cases and review of the literature. Acta Neurochir (Wien) 143 (4): 357-63; discussion 363-4, 2001. [PUBMED Abstract]
17. Goto M, Miller RW, Ishikawa Y, et al.: Excess of rare cancers in Werner syndrome (adult progeria). Cancer Epidemiol Biomarkers Prev 5 (4): 239-46, 1996. [PUBMED Abstract]
18. Fricke BL, Donnelly LF, Casper KA, et al.: Frequency and imaging appearance of hepatic angiomyolipomas in pediatric and adult patients with tuberous sclerosis. AJR Am J Roentgenol 182 (4): 1027-30, 2004. [PUBMED Abstract]
19. Adriaensen ME, Schaefer-Prokop CM, Duyndam DA, et al.: Radiological evidence of lymphangioleiomyomatosis in female and male patients with tuberous sclerosis complex. Clin Radiol 66 (7): 625-8, 2011. [PUBMED Abstract]
20. Hornick JL, Fletcher CD: PEComa: what do we know so far? Histopathology 48 (1): 75-82, 2006. [PUBMED Abstract]
21. Kesserwan C, Sokolic R, Cowen EW, et al.: Multicentric dermatofibrosarcoma protuberans in patients with adenosine deaminase-deficient severe combined immune deficiency. J Allergy Clin Immunol 129 (3): 762-769.e1, 2012. [PUBMED Abstract]
22. Spunt SL, Million L, Coffin C: The nonrhabdomyosarcoma soft tissue sarcoma. In: Pizzo PA, Poplack DG, eds.: Principles and Practice of Pediatric Oncology. 7th ed. Lippincott Williams and Wilkins, 2015, pp 827-54.
23. Weiss SW, Goldblum JR: Malignant fibrous histiocytoma (pleomorphic undifferentiated sarcoma). In: Weiss SW, Goldblum JR: Enzinger and Weiss's Soft Tissue Tumors. 5th ed. Mosby, 2008, pp 403-27.
24. Tukenova M, Guibout C, Hawkins M, et al.: Radiation therapy and late mortality from second sarcoma, carcinoma, and hematological malignancies after a solid cancer in childhood. Int J Radiat Oncol Biol Phys 80 (2): 339-46, 2011. [PUBMED Abstract]
25. Bartkowiak D, Humble N, Suhr P, et al.: Second cancer after radiotherapy, 1981-2007. Radiother Oncol 105 (1): 122-6, 2012. [PUBMED Abstract]
26. Casey DL, Friedman DN, Moskowitz CS, et al.: Second cancer risk in childhood cancer survivors treated with intensity-modulated radiation therapy (IMRT). Pediatr Blood Cancer 62 (2): 311-316, 2015. [PUBMED Abstract]
27. McClain KL, Leach CT, Jenson HB, et al.: Association of Epstein-Barr virus with leiomyosarcomas in children with AIDS. N Engl J Med 332 (1): 12-8, 1995. [PUBMED Abstract]
28. Dillon P, Maurer H, Jenkins J, et al.: A prospective study of nonrhabdomyosarcoma soft tissue sarcomas in the pediatric age group. J Pediatr Surg 27 (2): 241-4; discussion 244-5, 1992. [PUBMED Abstract]
29. Rao BN: Nonrhabdomyosarcoma in children: prognostic factors influencing survival. Semin Surg Oncol 9 (6): 524-31, 1993 Nov-Dec. [PUBMED Abstract]
30. Zeytoonjian T, Mankin HJ, Gebhardt MC, et al.: Distal lower extremity sarcomas: frequency of occurrence and patient survival rate. Foot Ankle Int 25 (5): 325-30, 2004. [PUBMED Abstract]
31. Benesch M, von Bueren AO, Dantonello T, et al.: Primary intracranial soft tissue sarcoma in children and adolescents: a cooperative analysis of the European CWS and HIT study groups. J Neurooncol 111 (3): 337-45, 2013. [PUBMED Abstract]
32. Weiss SW, Goldblum JR: Miscellaneous tumors of intermediate malignancy. In: Weiss SW, Goldblum JR: Enzinger and Weiss's Soft Tissue Tumors. 5th ed. Mosby, 2008, pp 1093-1160.
33. Giraudo C, Schoot R, Cardoen L, et al.: Indeterminate pulmonary nodules in non-rhabdomyosarcoma soft tissue sarcoma: A study of the European paediatric Soft Tissue Sarcoma Study Group. Cancer 130 (4): 597-608, 2024. [PUBMED Abstract]
34. Mody RJ, Bui C, Hutchinson RJ, et al.: FDG PET imaging of childhood sarcomas. Pediatr Blood Cancer 54 (2): 222-7, 2010. [PUBMED Abstract]
35. Tateishi U, Hosono A, Makimoto A, et al.: Accuracy of 18F fluorodeoxyglucose positron emission tomography/computed tomography in staging of pediatric sarcomas. J Pediatr Hematol Oncol 29 (9): 608-12, 2007. [PUBMED Abstract]
36. Sargar K, Kao SC, Spunt SL, et al.: MRI and CT of Low-Grade Fibromyxoid Sarcoma in Children: A Report From Children's Oncology Group Study ARST0332. AJR Am J Roentgenol 205 (2): 414-20, 2015. [PUBMED Abstract]
37. Weiss SW, Goldblum JR: Enzinger and Weiss's Soft Tissue Tumors. 5th ed. Mosby, 2008.
38. Recommendations for the reporting of soft tissue sarcomas. Association of Directors of Anatomic and Surgical Pathology. Mod Pathol 11 (12): 1257-61, 1998. [PUBMED Abstract]
39. Strauss DC, Qureshi YA, Hayes AJ, et al.: The role of core needle biopsy in the diagnosis of suspected soft tissue tumours. J Surg Oncol 102 (5): 523-9, 2010. [PUBMED Abstract]
40. Chowdhury T, Barnacle A, Haque S, et al.: Ultrasound-guided core needle biopsy for the diagnosis of rhabdomyosarcoma in childhood. Pediatr Blood Cancer 53 (3): 356-60, 2009. [PUBMED Abstract]
41. Tuttle R, Kane JM: Biopsy techniques for soft tissue and bowel sarcomas. J Surg Oncol 111 (5): 504-12, 2015. [PUBMED Abstract]
42. Coffin CM, Dehner LP, O'Shea PA: Pediatric Soft Tissue Tumors: A Clinical, Pathological, and Therapeutic Approach. Williams and Wilkins, 1997.
43. Smith LM, Watterson J, Scott SM: Medical and surgical management of pediatric soft tissue tumors. In: Coffin CM, Dehner LP, O'Shea PA: Pediatric Soft Tissue Tumors: A Clinical, Pathological, and Therapeutic Approach. Williams and Wilkins, 1997, pp 360-71.
44. Neville HL, Andrassy RJ, Lally KP, et al.: Lymphatic mapping with sentinel node biopsy in pediatric patients. J Pediatr Surg 35 (6): 961-4, 2000. [PUBMED Abstract]
45. Neville HL, Raney RB, Andrassy RJ, et al.: Multidisciplinary management of pediatric soft-tissue sarcoma. Oncology (Huntingt) 14 (10): 1471-81; discussion 1482-6, 1489-90, 2000. [PUBMED Abstract]
46. Kayton ML, Delgado R, Busam K, et al.: Experience with 31 sentinel lymph node biopsies for sarcomas and carcinomas in pediatric patients. Cancer 112 (9): 2052-9, 2008. [PUBMED Abstract]
47. Dall'Igna P, De Corti F, Alaggio R, et al.: Sentinel node biopsy in pediatric patients: the experience in a single institution. Eur J Pediatr Surg 24 (6): 482-7, 2014. [PUBMED Abstract]
48. Parida L, Morrisson GT, Shammas A, et al.: Role of lymphoscintigraphy and sentinel lymph node biopsy in the management of pediatric melanoma and sarcoma. Pediatr Surg Int 28 (6): 571-8, 2012. [PUBMED Abstract]
49. Alcorn KM, Deans KJ, Congeni A, et al.: Sentinel lymph node biopsy in pediatric soft tissue sarcoma patients: utility and concordance with imaging. J Pediatr Surg 48 (9): 1903-6, 2013. [PUBMED Abstract]
50. Wagner LM, Kremer N, Gelfand MJ, et al.: Detection of lymph node metastases in pediatric and adolescent/young adult sarcoma: Sentinel lymph node biopsy versus fludeoxyglucose positron emission tomography imaging-A prospective trial. Cancer 123 (1): 155-160, 2017. [PUBMED Abstract]
51. Alvarez E, He J, Spunt SL, et al.: Lymph node metastases in paediatric and young adult patients with non-rhabdomyosarcoma soft tissue sarcoma (NRSTS): Findings from Children's Oncology Group (COG) study ARST0332. Eur J Cancer 180: 89-98, 2023. [PUBMED Abstract]
52. Chui CH, Spunt SL, Liu T, et al.: Is reexcision in pediatric nonrhabdomyosarcoma soft tissue sarcoma necessary after an initial unplanned resection? J Pediatr Surg 37 (10): 1424-9, 2002. [PUBMED Abstract]
53. Cecchetto G, Guglielmi M, Inserra A, et al.: Primary re-excision: the Italian experience in patients with localized soft-tissue sarcomas. Pediatr Surg Int 17 (7): 532-4, 2001. [PUBMED Abstract]
54. Qureshi YA, Huddy JR, Miller JD, et al.: Unplanned excision of soft tissue sarcoma results in increased rates of local recurrence despite full further oncological treatment. Ann Surg Oncol 19 (3): 871-7, 2012. [PUBMED Abstract]
55. Sandberg AA: Translocations in malignant tumors. Am J Pathol 159 (6): 1979-80, 2001. [PUBMED Abstract]
56. Slater O, Shipley J: Clinical relevance of molecular genetics to paediatric sarcomas. J Clin Pathol 60 (11): 1187-94, 2007. [PUBMED Abstract]
57. Mertens F, Antonescu CR, Hohenberger P, et al.: Translocation-related sarcomas. Semin Oncol 36 (4): 312-23, 2009. [PUBMED Abstract]
58. Romeo S, Dei Tos AP: Clinical application of molecular pathology in sarcomas. Curr Opin Oncol 23 (4): 379-84, 2011. [PUBMED Abstract]
59. Schaefer IM, Cote GM, Hornick JL: Contemporary Sarcoma Diagnosis, Genetics, and Genomics. J Clin Oncol 36 (2): 101-110, 2018. [PUBMED Abstract]
60. Ladanyi M, Lui MY, Antonescu CR, et al.: The der(17)t(X;17)(p11;q25) of human alveolar soft part sarcoma fuses the TFE3 transcription factor gene to ASPL, a novel gene at 17q25. Oncogene 20 (1): 48-57, 2001. [PUBMED Abstract]
61. Ladanyi M: The emerging molecular genetics of sarcoma translocations. Diagn Mol Pathol 4 (3): 162-73, 1995. [PUBMED Abstract]
62. Williams A, Bartle G, Sumathi VP, et al.: Detection of ASPL/TFE3 fusion transcripts and the TFE3 antigen in formalin-fixed, paraffin-embedded tissue in a series of 18 cases of alveolar soft part sarcoma: useful diagnostic tools in cases with unusual histological features. Virchows Arch 458 (3): 291-300, 2011. [PUBMED Abstract]
63. Antonescu CR, Dal Cin P, Nafa K, et al.: EWSR1-CREB1 is the predominant gene fusion in angiomatoid fibrous histiocytoma. Genes Chromosomes Cancer 46 (12): 1051-60, 2007. [PUBMED Abstract]
64. Hisaoka M, Ishida T, Kuo TT, et al.: Clear cell sarcoma of soft tissue: a clinicopathologic, immunohistochemical, and molecular analysis of 33 cases. Am J Surg Pathol 32 (3): 452-60, 2008. [PUBMED Abstract]
65. Barnoud R, Sabourin JC, Pasquier D, et al.: Immunohistochemical expression of WT1 by desmoplastic small round cell tumor: a comparative study with other small round cell tumors. Am J Surg Pathol 24 (6): 830-6, 2000. [PUBMED Abstract]
66. Wang LL, Perlman EJ, Vujanic GM, et al.: Desmoplastic small round cell tumor of the kidney in childhood. Am J Surg Pathol 31 (4): 576-84, 2007. [PUBMED Abstract]
67. Errani C, Zhang L, Sung YS, et al.: A novel WWTR1-CAMTA1 gene fusion is a consistent abnormality in epithelioid hemangioendothelioma of different anatomic sites. Genes Chromosomes Cancer 50 (8): 644-53, 2011. [PUBMED Abstract]
68. Haller F, Knopf J, Ackermann A, et al.: Paediatric and adult soft tissue sarcomas with NTRK1 gene fusions: a subset of spindle cell sarcomas unified by a prominent myopericytic/haemangiopericytic pattern. J Pathol 238 (5): 700-10, 2016. [PUBMED Abstract]
69. Jain S, Xu R, Prieto VG, et al.: Molecular classification of soft tissue sarcomas and its clinical applications. Int J Clin Exp Pathol 3 (4): 416-28, 2010. [PUBMED Abstract]
70. Agaimy A, Bieg M, Michal M, et al.: Recurrent Somatic PDGFRB Mutations in Sporadic Infantile/Solitary Adult Myofibromas But Not in Angioleiomyomas and Myopericytomas. Am J Surg Pathol 41 (2): 195-203, 2017. [PUBMED Abstract]
71. Spunt SL, Hill DA, Motosue AM, et al.: Clinical features and outcome of initially unresected nonmetastatic pediatric nonrhabdomyosarcoma soft tissue sarcoma. J Clin Oncol 20 (15): 3225-35, 2002. [PUBMED Abstract]
72. Spunt SL, Poquette CA, Hurt YS, et al.: Prognostic factors for children and adolescents with surgically resected nonrhabdomyosarcoma soft tissue sarcoma: an analysis of 121 patients treated at St Jude Children's Research Hospital. J Clin Oncol 17 (12): 3697-705, 1999. [PUBMED Abstract]
73. Ferrari A, Casanova M, Collini P, et al.: Adult-type soft tissue sarcomas in pediatric-age patients: experience at the Istituto Nazionale Tumori in Milan. J Clin Oncol 23 (18): 4021-30, 2005. [PUBMED Abstract]
74. Brooks AD, Heslin MJ, Leung DH, et al.: Superficial extremity soft tissue sarcoma: an analysis of prognostic factors. Ann Surg Oncol 5 (1): 41-7, 1998 Jan-Feb. [PUBMED Abstract]
75. Ferrari A, Miceli R, Meazza C, et al.: Soft tissue sarcomas of childhood and adolescence: the prognostic role of tumor size in relation to patient body size. J Clin Oncol 27 (3): 371-6, 2009. [PUBMED Abstract]
76. Rodeberg DA, Stoner JA, Garcia-Henriquez N, et al.: Tumor volume and patient weight as predictors of outcome in children with intermediate risk rhabdomyosarcoma: a report from the Children's Oncology Group. Cancer 117 (11): 2541-50, 2011. [PUBMED Abstract]
77. Hong DS, DuBois SG, Kummar S, et al.: Larotrectinib in patients with TRK fusion-positive solid tumours: a pooled analysis of three phase 1/2 clinical trials. Lancet Oncol 21 (4): 531-540, 2020. [PUBMED Abstract]
78. Weiss SW, Goldblum JR: Enzinger and Weiss's Soft Tissue Tumors. 4th ed. Mosby, 2001.
79. Spunt SL, Million L, Chi YY, et al.: A risk-based treatment strategy for non-rhabdomyosarcoma soft-tissue sarcomas in patients younger than 30 years (ARST0332): a Children's Oncology Group prospective study. Lancet Oncol 21 (1): 145-161, 2020. [PUBMED Abstract]
80. Million L, Hayes-Jordan A, Chi YY, et al.: Local Control For High-Grade Nonrhabdomyosarcoma Soft Tissue Sarcoma Assigned to Radiation Therapy on ARST0332: A Report From the Childrens Oncology Group. Int J Radiat Oncol Biol Phys 110 (3): 821-830, 2021. [PUBMED Abstract]
81. O'Sullivan B, Davis AM, Turcotte R, et al.: Preoperative versus postoperative radiotherapy in soft-tissue sarcoma of the limbs: a randomised trial. Lancet 359 (9325): 2235-41, 2002. [PUBMED Abstract]
82. Ferrari A, Miceli R, Rey A, et al.: Non-metastatic unresected paediatric non-rhabdomyosarcoma soft tissue sarcomas: results of a pooled analysis from United States and European groups. Eur J Cancer 47 (5): 724-31, 2011. [PUBMED Abstract]
83. Smith KB, Indelicato DJ, Knapik JA, et al.: Definitive radiotherapy for unresectable pediatric and young adult nonrhabdomyosarcoma soft tissue sarcoma. Pediatr Blood Cancer 57 (2): 247-51, 2011. [PUBMED Abstract]
84. Ferrari A, Magni C, Bergamaschi L, et al.: Pediatric nonrhabdomyosarcoma soft tissue sarcomas arising at visceral sites. Pediatr Blood Cancer 64 (9): , 2017. [PUBMED Abstract]
85. Ferrari A, van Noesel MM, Brennan B, et al.: Paediatric non-rhabdomyosarcoma soft tissue sarcomas: the prospective NRSTS 2005 study by the European Pediatric Soft Tissue Sarcoma Study Group (EpSSG). Lancet Child Adolesc Health 5 (8): 546-558, 2021. [PUBMED Abstract]
86. Dillon PW, Whalen TV, Azizkhan RG, et al.: Neonatal soft tissue sarcomas: the influence of pathology on treatment and survival. Children's Cancer Group Surgical Committee. J Pediatr Surg 30 (7): 1038-41, 1995. [PUBMED Abstract]
87. Pappo AS, Fontanesi J, Luo X, et al.: Synovial sarcoma in children and adolescents: the St Jude Children's Research Hospital experience. J Clin Oncol 12 (11): 2360-6, 1994. [PUBMED Abstract]
88. Marcus KC, Grier HE, Shamberger RC, et al.: Childhood soft tissue sarcoma: a 20-year experience. J Pediatr 131 (4): 603-7, 1997. [PUBMED Abstract]
89. Pratt CB, Pappo AS, Gieser P, et al.: Role of adjuvant chemotherapy in the treatment of surgically resected pediatric nonrhabdomyosarcomatous soft tissue sarcomas: A Pediatric Oncology Group Study. J Clin Oncol 17 (4): 1219, 1999. [PUBMED Abstract]
90. Pratt CB, Maurer HM, Gieser P, et al.: Treatment of unresectable or metastatic pediatric soft tissue sarcomas with surgery, irradiation, and chemotherapy: a Pediatric Oncology Group study. Med Pediatr Oncol 30 (4): 201-9, 1998. [PUBMED Abstract]

References

1. WHO Classification of Tumours Editorial Board: WHO Classification of Tumours. Volume 3: Soft Tissue and Bone Tumours. 5th ed., IARC Press, 2020.
2. Steelman C, Katzenstein H, Parham D, et al.: Unusual presentation of congenital infantile fibrosarcoma in seven infants with molecular-genetic analysis. Fetal Pediatr Pathol 30 (5): 329-37, 2011. [PUBMED Abstract]
3. Evans HL: Low-grade fibromyxoid sarcoma: a clinicopathologic study of 33 cases with long-term follow-up. Am J Surg Pathol 35 (10): 1450-62, 2011. [PUBMED Abstract]
4. Antonescu CR: Emerging soft tissue tumors with kinase fusions: An overview of the recent literature with an emphasis on diagnostic criteria. Genes Chromosomes Cancer 59 (8): 437-444, 2020. [PUBMED Abstract]
5. Ortiz MV, Gerdemann U, Raju SG, et al.: Activity of the Highly Specific RET Inhibitor Selpercatinib (LOXO-292) in Pediatric Patients With Tumors Harboring RET Gene Alterations. JCO Precis Oncol 4: , 2020. [PUBMED Abstract]

Assessment of disease extent has an important role in predicting the clinical outcome and determining the most effective therapy for pediatric soft tissue sarcomas. As yet, there is no well-accepted assessment system that is applicable to all childhood sarcomas. The system from the American Joint Committee on Cancer (AJCC) that is used for adults has not been validated in pediatric studies.

No standardized staging system for pediatric nonrhabdomyosarcomatous soft tissue sarcomas (NRSTS) exists, but two systems are currently in use for assessment of disease extent:[1]

References

1. American Joint Committee on Cancer: AJCC Cancer Staging Manual. 6th ed. Springer, 2002.
2. Maurer HM, Beltangady M, Gehan EA, et al.: The Intergroup Rhabdomyosarcoma Study-I. A final report. Cancer 61 (2): 209-20, 1988. [PUBMED Abstract]
3. O'Sullivan B, Maki RG, Agulnik M, et al.: Soft tissue sarcoma of the head and neck. In: Amin MB, Edge SB, Greene FL, et al., eds.: AJCC Cancer Staging Manual. 8th ed. Springer; 2017, pp 499-505.
4. Yoon SS, Maki RG, Asare EA, et al.: Soft tissue sarcoma of the trunk and extremities. In: Amin MB, Edge SB, Greene FL, et al., eds.: AJCC Cancer Staging Manual. 8th ed. Springer; 2017, pp 507-15.
5. Raut CP, Maki RG, Baldini EH, et al.: Soft tissue sarcoma of the abdomen and thoracic visceral organs. In: Amin MB, Edge SB, Greene FL, et al., eds.: AJCC Cancer Staging Manual. 8th ed. Springer; 2017, pp 517-21.
6. Pollock RE, Maki RG, Baldini EH, et al.: Soft tissue sarcoma of the retroperitoneum. In: Amin MB, Edge SB, Greene FL, et al., eds.: AJCC Cancer Staging Manual. 8th ed. Springer; 2017, pp 531-7.
7. Maki RG, Folpe AL, Guadagnolo BA, et al.: Soft tissue sarcoma - unusual histologies and sites. In: Amin MB, Edge SB, Greene FL, et al., eds.: AJCC Cancer Staging Manual. 8th ed. Springer; 2017, pp 539-45.
8. Waxweiler TV, Rusthoven CG, Proper MS, et al.: Non-Rhabdomyosarcoma Soft Tissue Sarcomas in Children: A Surveillance, Epidemiology, and End Results Analysis Validating COG Risk Stratifications. Int J Radiat Oncol Biol Phys 92 (2): 339-48, 2015. [PUBMED Abstract]
9. Parham DM, Webber BL, Jenkins JJ, et al.: Nonrhabdomyosarcomatous soft tissue sarcomas of childhood: formulation of a simplified system for grading. Mod Pathol 8 (7): 705-10, 1995. [PUBMED Abstract]
10. Recommendations for the reporting of soft tissue sarcomas. Association of Directors of Anatomic and Surgical Pathology. Mod Pathol 11 (12): 1257-61, 1998. [PUBMED Abstract]
11. Skytting B, Meis-Kindblom JM, Larsson O, et al.: Synovial sarcoma--identification of favorable and unfavorable histologic types: a Scandinavian sarcoma group study of 104 cases. Acta Orthop Scand 70 (6): 543-54, 1999. [PUBMED Abstract]
12. Rao BN: Nonrhabdomyosarcoma in children: prognostic factors influencing survival. Semin Surg Oncol 9 (6): 524-31, 1993 Nov-Dec. [PUBMED Abstract]
13. Pisters PW, Leung DH, Woodruff J, et al.: Analysis of prognostic factors in 1,041 patients with localized soft tissue sarcomas of the extremities. J Clin Oncol 14 (5): 1679-89, 1996. [PUBMED Abstract]
14. Coindre JM, Terrier P, Bui NB, et al.: Prognostic factors in adult patients with locally controlled soft tissue sarcoma. A study of 546 patients from the French Federation of Cancer Centers Sarcoma Group. J Clin Oncol 14 (3): 869-77, 1996. [PUBMED Abstract]
15. Pappo AS, Fontanesi J, Luo X, et al.: Synovial sarcoma in children and adolescents: the St Jude Children's Research Hospital experience. J Clin Oncol 12 (11): 2360-6, 1994. [PUBMED Abstract]
16. Pratt CB, Maurer HM, Gieser P, et al.: Treatment of unresectable or metastatic pediatric soft tissue sarcomas with surgery, irradiation, and chemotherapy: a Pediatric Oncology Group study. Med Pediatr Oncol 30 (4): 201-9, 1998. [PUBMED Abstract]
17. Khoury JD, Coffin CM, Spunt SL, et al.: Grading of nonrhabdomyosarcoma soft tissue sarcoma in children and adolescents: a comparison of parameters used for the Fédération Nationale des Centers de Lutte Contre le Cancer and Pediatric Oncology Group Systems. Cancer 116 (9): 2266-74, 2010. [PUBMED Abstract]
18. Spunt SL, Million L, Chi YY, et al.: A risk-based treatment strategy for non-rhabdomyosarcoma soft-tissue sarcomas in patients younger than 30 years (ARST0332): a Children's Oncology Group prospective study. Lancet Oncol 21 (1): 145-161, 2020. [PUBMED Abstract]
19. Coindre JM, Terrier P, Guillou L, et al.: Predictive value of grade for metastasis development in the main histologic types of adult soft tissue sarcomas: a study of 1240 patients from the French Federation of Cancer Centers Sarcoma Group. Cancer 91 (10): 1914-26, 2001. [PUBMED Abstract]
20. Guillou L, Coindre JM, Bonichon F, et al.: Comparative study of the National Cancer Institute and French Federation of Cancer Centers Sarcoma Group grading systems in a population of 410 adult patients with soft tissue sarcoma. J Clin Oncol 15 (1): 350-62, 1997. [PUBMED Abstract]

Because of the rarity of pediatric nonrhabdomyosarcomatous soft tissue sarcomas (NRSTS), treatment should be coordinated by a multidisciplinary team that includes oncologists (pediatric or medical), pathologists, surgeons, and radiation oncologists for all children, adolescents, and young adults with these tumors. In addition, to better define the tumors' natural history and response to therapy, entry into national or institutional treatment protocols should be considered for children with rare neoplasms. Information about ongoing clinical trials is available from the NCI website.

The Children's Oncology Group (COG) performed a prospective nonrandomized trial (ARST0332 [NCT00346164]) for patients with soft tissue sarcomas.[1]

Surgical resection of the primary tumor was classified as follows:

Patients were assigned to one of the following three risk groups:

The treatment groups were as follows:

Chemotherapy included six cycles of intravenous (IV) ifosfamide (3 g/m2 per dose) on days 1 through 3 and five cycles of IV doxorubicin (37.5 mg/m2 per dose) on days 1 to 2 every 3 weeks, with the sequence adjusted on the basis of timing of surgery or radiation therapy.

The analysis included 529 evaluable patients: low risk (n = 222), intermediate risk (n = 227), and high risk (n = 80). Patients underwent surgery alone (n = 205), radiation therapy (n = 17), chemoradiation therapy (n = 111), and neoadjuvant chemoradiation therapy (n = 196).

At a median follow-up of 6.5 years (interquartile range [IQR], 4.9–7.9), the 5-year event-free survival (EFS) and overall survival (OS) rates, by risk group, were as follows:

The authors concluded that pretreatment clinical features can be used to effectively define treatment failure risk and stratify young patients with NRSTS for risk-adapted therapy. Most low-risk patients can be cured without adjuvant therapy, avoiding known long-term treatment complications. Survival remains suboptimal for intermediate-risk and high-risk patients, and novel therapies are needed for these patients.

References

1. Spunt SL, Million L, Chi YY, et al.: A risk-based treatment strategy for non-rhabdomyosarcoma soft-tissue sarcomas in patients younger than 30 years (ARST0332): a Children's Oncology Group prospective study. Lancet Oncol 21 (1): 145-161, 2020. [PUBMED Abstract]
2. Douglass DP, Coffin CM, Randall RL, et al.: Clinical features and outcomes of young patients with low-grade non-rhabdomyosarcoma soft tissue sarcomas treated with a risk-based strategy: A report from Children's Oncology Group study ARST0332. Pediatr Blood Cancer 71 (8): e31062, 2024. [PUBMED Abstract]
3. Million L, Hayes-Jordan A, Chi YY, et al.: Local Control For High-Grade Nonrhabdomyosarcoma Soft Tissue Sarcoma Assigned to Radiation Therapy on ARST0332: A Report From the Childrens Oncology Group. Int J Radiat Oncol Biol Phys 110 (3): 821-830, 2021. [PUBMED Abstract]
4. Sugiura H, Takahashi M, Katagiri H, et al.: Additional wide resection of malignant soft tissue tumors. Clin Orthop (394): 201-10, 2002. [PUBMED Abstract]
5. Cecchetto G, Guglielmi M, Inserra A, et al.: Primary re-excision: the Italian experience in patients with localized soft-tissue sarcomas. Pediatr Surg Int 17 (7): 532-4, 2001. [PUBMED Abstract]
6. Chui CH, Spunt SL, Liu T, et al.: Is reexcision in pediatric nonrhabdomyosarcoma soft tissue sarcoma necessary after an initial unplanned resection? J Pediatr Surg 37 (10): 1424-9, 2002. [PUBMED Abstract]
7. Paulino AC, Ritchie J, Wen BC: The value of postoperative radiotherapy in childhood nonrhabdomyosarcoma soft tissue sarcoma. Pediatr Blood Cancer 43 (5): 587-93, 2004. [PUBMED Abstract]
8. Kaste SC, Hill A, Conley L, et al.: Magnetic resonance imaging after incomplete resection of soft tissue sarcoma. Clin Orthop (397): 204-11, 2002. [PUBMED Abstract]
9. Chandrasekar CR, Wafa H, Grimer RJ, et al.: The effect of an unplanned excision of a soft-tissue sarcoma on prognosis. J Bone Joint Surg Br 90 (2): 203-8, 2008. [PUBMED Abstract]
10. Daigeler A, Kuhnen C, Moritz R, et al.: Lymph node metastases in soft tissue sarcomas: a single center analysis of 1,597 patients. Langenbecks Arch Surg 394 (2): 321-9, 2009. [PUBMED Abstract]
11. Mazeron JJ, Suit HD: Lymph nodes as sites of metastases from sarcomas of soft tissue. Cancer 60 (8): 1800-8, 1987. [PUBMED Abstract]
12. Neville HL, Andrassy RJ, Lally KP, et al.: Lymphatic mapping with sentinel node biopsy in pediatric patients. J Pediatr Surg 35 (6): 961-4, 2000. [PUBMED Abstract]
13. Neville HL, Raney RB, Andrassy RJ, et al.: Multidisciplinary management of pediatric soft-tissue sarcoma. Oncology (Huntingt) 14 (10): 1471-81; discussion 1482-6, 1489-90, 2000. [PUBMED Abstract]
14. Kayton ML, Delgado R, Busam K, et al.: Experience with 31 sentinel lymph node biopsies for sarcomas and carcinomas in pediatric patients. Cancer 112 (9): 2052-9, 2008. [PUBMED Abstract]
15. Dall'Igna P, De Corti F, Alaggio R, et al.: Sentinel node biopsy in pediatric patients: the experience in a single institution. Eur J Pediatr Surg 24 (6): 482-7, 2014. [PUBMED Abstract]
16. Parida L, Morrisson GT, Shammas A, et al.: Role of lymphoscintigraphy and sentinel lymph node biopsy in the management of pediatric melanoma and sarcoma. Pediatr Surg Int 28 (6): 571-8, 2012. [PUBMED Abstract]
17. Alcorn KM, Deans KJ, Congeni A, et al.: Sentinel lymph node biopsy in pediatric soft tissue sarcoma patients: utility and concordance with imaging. J Pediatr Surg 48 (9): 1903-6, 2013. [PUBMED Abstract]
18. Haas RL, Gronchi A, van de Sande MAJ, et al.: Perioperative Management of Extremity Soft Tissue Sarcomas. J Clin Oncol 36 (2): 118-124, 2018. [PUBMED Abstract]
19. Crompton JG, Ogura K, Bernthal NM, et al.: Local Control of Soft Tissue and Bone Sarcomas. J Clin Oncol 36 (2): 111-117, 2018. [PUBMED Abstract]
20. Nussbaum DP, Rushing CN, Lane WO, et al.: Preoperative or postoperative radiotherapy versus surgery alone for retroperitoneal sarcoma: a case-control, propensity score-matched analysis of a nationwide clinical oncology database. Lancet Oncol 17 (7): 966-975, 2016. [PUBMED Abstract]
21. Merchant TE, Parsh N, del Valle PL, et al.: Brachytherapy for pediatric soft-tissue sarcoma. Int J Radiat Oncol Biol Phys 46 (2): 427-32, 2000. [PUBMED Abstract]
22. Schomberg PJ, Gunderson LL, Moir CR, et al.: Intraoperative electron irradiation in the management of pediatric malignancies. Cancer 79 (11): 2251-6, 1997. [PUBMED Abstract]
23. Nag S, Shasha D, Janjan N, et al.: The American Brachytherapy Society recommendations for brachytherapy of soft tissue sarcomas. Int J Radiat Oncol Biol Phys 49 (4): 1033-43, 2001. [PUBMED Abstract]
24. Viani GA, Novaes PE, Jacinto AA, et al.: High-dose-rate brachytherapy for soft tissue sarcoma in children: a single institution experience. Radiat Oncol 3: 9, 2008. [PUBMED Abstract]
25. Virkus WW, Mollabashy A, Reith JD, et al.: Preoperative radiotherapy in the treatment of soft tissue sarcomas. Clin Orthop (397): 177-89, 2002. [PUBMED Abstract]
26. Zagars GK, Ballo MT, Pisters PW, et al.: Preoperative vs. postoperative radiation therapy for soft tissue sarcoma: a retrospective comparative evaluation of disease outcome. Int J Radiat Oncol Biol Phys 56 (2): 482-8, 2003. [PUBMED Abstract]
27. Dickie C, Parent A, Griffin AM, et al.: The value of adaptive preoperative radiotherapy in management of soft tissue sarcoma. Radiother Oncol 122 (3): 458-463, 2017. [PUBMED Abstract]
28. O'Sullivan B, Davis AM, Turcotte R, et al.: Preoperative versus postoperative radiotherapy in soft-tissue sarcoma of the limbs: a randomised trial. Lancet 359 (9325): 2235-41, 2002. [PUBMED Abstract]
29. Davis AM, O'Sullivan B, Turcotte R, et al.: Late radiation morbidity following randomization to preoperative versus postoperative radiotherapy in extremity soft tissue sarcoma. Radiother Oncol 75 (1): 48-53, 2005. [PUBMED Abstract]
30. Rao AD, Chen Q, Million L, et al.: Preoperative Intensity Modulated Radiation Therapy Compared to Three-Dimensional Conformal Radiation Therapy for High-Grade Extremity Sarcomas in Children: Analysis of the Children's Oncology Group Study ARST0332. Int J Radiat Oncol Biol Phys 103 (1): 38-44, 2019. [PUBMED Abstract]
31. Seddon B, Grange FL, Simões R, et al.: The IMRiS Trial: A Phase 2 Study of Intensity Modulated Radiation Therapy in Extremity Soft Tissue Sarcoma. Int J Radiat Oncol Biol Phys 120 (4): 978-989, 2024. [PUBMED Abstract]
32. Marcus KC, Grier HE, Shamberger RC, et al.: Childhood soft tissue sarcoma: a 20-year experience. J Pediatr 131 (4): 603-7, 1997. [PUBMED Abstract]
33. Delaney TF, Kepka L, Goldberg SI, et al.: Radiation therapy for control of soft-tissue sarcomas resected with positive margins. Int J Radiat Oncol Biol Phys 67 (5): 1460-9, 2007. [PUBMED Abstract]
34. Blakely ML, Spurbeck WW, Pappo AS, et al.: The impact of margin of resection on outcome in pediatric nonrhabdomyosarcoma soft tissue sarcoma. J Pediatr Surg 34 (5): 672-5, 1999. [PUBMED Abstract]
35. Skytting B: Synovial sarcoma. A Scandinavian Sarcoma Group project. Acta Orthop Scand Suppl 291: 1-28, 2000. [PUBMED Abstract]
36. Hua C, Gray JM, Merchant TE, et al.: Treatment planning and delivery of external beam radiotherapy for pediatric sarcoma: the St. Jude Children's Research Hospital experience. Int J Radiat Oncol Biol Phys 70 (5): 1598-606, 2008. [PUBMED Abstract]
37. Pratt CB, Pappo AS, Gieser P, et al.: Role of adjuvant chemotherapy in the treatment of surgically resected pediatric nonrhabdomyosarcomatous soft tissue sarcomas: A Pediatric Oncology Group Study. J Clin Oncol 17 (4): 1219, 1999. [PUBMED Abstract]
38. Karakousis CP, Driscoll DL: Treatment and local control of primary extremity soft tissue sarcomas. J Surg Oncol 71 (3): 155-61, 1999. [PUBMED Abstract]
39. Zagars GK, Ballo MT, Pisters PW, et al.: Prognostic factors for disease-specific survival after first relapse of soft-tissue sarcoma: analysis of 402 patients with disease relapse after initial conservative surgery and radiotherapy. Int J Radiat Oncol Biol Phys 57 (3): 739-47, 2003. [PUBMED Abstract]
40. Raut CP, Miceli R, Strauss DC, et al.: External validation of a multi-institutional retroperitoneal sarcoma nomogram. Cancer 122 (9): 1417-24, 2016. [PUBMED Abstract]
41. Baldini EH, Wang D, Haas RL, et al.: Treatment Guidelines for Preoperative Radiation Therapy for Retroperitoneal Sarcoma: Preliminary Consensus of an International Expert Panel. Int J Radiat Oncol Biol Phys 92 (3): 602-12, 2015. [PUBMED Abstract]
42. Bishop AJ, Zagars GK, Torres KE, et al.: Combined Modality Management of Retroperitoneal Sarcomas: A Single-Institution Series of 121 Patients. Int J Radiat Oncol Biol Phys 93 (1): 158-65, 2015. [PUBMED Abstract]
43. Al Yami A, Griffin AM, Ferguson PC, et al.: Positive surgical margins in soft tissue sarcoma treated with preoperative radiation: is a postoperative boost necessary? Int J Radiat Oncol Biol Phys 77 (4): 1191-7, 2010. [PUBMED Abstract]
44. Wang D, Bosch W, Kirsch DG, et al.: Variation in the gross tumor volume and clinical target volume for preoperative radiotherapy of primary large high-grade soft tissue sarcoma of the extremity among RTOG sarcoma radiation oncologists. Int J Radiat Oncol Biol Phys 81 (5): e775-80, 2011. [PUBMED Abstract]
45. Bahig H, Roberge D, Bosch W, et al.: Agreement among RTOG sarcoma radiation oncologists in contouring suspicious peritumoral edema for preoperative radiation therapy of soft tissue sarcoma of the extremity. Int J Radiat Oncol Biol Phys 86 (2): 298-303, 2013. [PUBMED Abstract]
46. Ferrari A: Role of chemotherapy in pediatric nonrhabdomyosarcoma soft-tissue sarcomas. Expert Rev Anticancer Ther 8 (6): 929-38, 2008. [PUBMED Abstract]
47. Adjuvant chemotherapy for localised resectable soft-tissue sarcoma of adults: meta-analysis of individual data. Sarcoma Meta-analysis Collaboration. Lancet 350 (9092): 1647-54, 1997. [PUBMED Abstract]
48. Woll PJ, Reichardt P, Le Cesne A, et al.: Adjuvant chemotherapy with doxorubicin, ifosfamide, and lenograstim for resected soft-tissue sarcoma (EORTC 62931): a multicentre randomised controlled trial. Lancet Oncol 13 (10): 1045-54, 2012. [PUBMED Abstract]
49. Demetri GD, Chawla SP, Ray-Coquard I, et al.: Results of an international randomized phase III trial of the mammalian target of rapamycin inhibitor ridaforolimus versus placebo to control metastatic sarcomas in patients after benefit from prior chemotherapy. J Clin Oncol 31 (19): 2485-92, 2013. [PUBMED Abstract]
50. van der Graaf WT, Blay JY, Chawla SP, et al.: Pazopanib for metastatic soft-tissue sarcoma (PALETTE): a randomised, double-blind, placebo-controlled phase 3 trial. Lancet 379 (9829): 1879-86, 2012. [PUBMED Abstract]
51. Mir O, Brodowicz T, Italiano A, et al.: Safety and efficacy of regorafenib in patients with advanced soft tissue sarcoma (REGOSARC): a randomised, double-blind, placebo-controlled, phase 2 trial. Lancet Oncol 17 (12): 1732-1742, 2016. [PUBMED Abstract]
52. Weiss AR, Chen YL, Scharschmidt TJ, et al.: Pathological response in children and adults with large unresected intermediate-grade or high-grade soft tissue sarcoma receiving preoperative chemoradiotherapy with or without pazopanib (ARST1321): a multicentre, randomised, open-label, phase 2 trial. Lancet Oncol 21 (8): 1110-1122, 2020. [PUBMED Abstract]
53. Kayton ML, Weiss AR, Xue W, et al.: Neoadjuvant pazopanib in nonrhabdomyosarcoma soft tissue sarcomas (ARST1321): A report of major wound complications from the Children's Oncology Group and NRG Oncology. J Surg Oncol 127 (5): 871-881, 2023. [PUBMED Abstract]
54. Weiss AR, Chen YL, Scharschmidt TJ, et al.: Outcomes After Preoperative Chemoradiation With or Without Pazopanib in Non-Rhabdomyosarcoma Soft Tissue Sarcoma: A Report From Children's Oncology Group and NRG Oncology. J Clin Oncol 41 (31): 4842-4848, 2023. [PUBMED Abstract]

Cancer in children and adolescents is rare, although the overall incidence has slowly increased since 1975.[1] Children and adolescents with cancer should be referred to medical centers that have a multidisciplinary team of cancer specialists with experience treating the cancers that occur during childhood and adolescence. This multidisciplinary team approach incorporates the skills of the following pediatric specialists and others to ensure that children receive treatment, supportive care, and rehabilitation to achieve optimal survival and quality of life:

For specific information about supportive care for children and adolescents with cancer, see the summaries on Supportive and Palliative Care.

The American Academy of Pediatrics has outlined guidelines for pediatric cancer centers and their role in the treatment of children and adolescents with cancer.[2] At these centers, clinical trials are available for most types of cancer that occur in children and adolescents, and the opportunity to participate is offered to most patients and their families. Multidisciplinary evaluation in pediatric cancer centers that have surgical and radiotherapeutic expertise is of critical importance to ensure the best clinical outcome for these patients. Although surgery with or without radiation therapy can be curative for a significant proportion of patients, the addition of chemotherapy might benefit subsets of children with the disease. Therefore, enrollment in clinical trials is encouraged. Clinical trials for children and adolescents with cancer are generally designed to compare potentially better therapy with current standard therapy. Other types of clinical trials test novel therapies when there is no standard therapy for a cancer diagnosis. Most of the progress in identifying curative therapies for childhood cancers has been achieved through clinical trials. Information about ongoing clinical trials is available from the NCI website.

Many therapeutic strategies for children and adolescents with soft tissue tumors are similar to those for adult patients, although there are important differences. For example, the biology of the neoplasm in pediatric patients may differ dramatically from that of the adult lesion. Additionally, limb-sparing procedures are more difficult to perform in pediatric patients. The morbidity associated with radiation therapy, particularly in infants and young children, may be much greater than that observed in adults.[3]

Improved outcomes with multimodality therapy in adults and children with soft tissue sarcomas over the past 20 years have caused increasing concern about the potential long-term side effects of this therapy in children. To maximize tumor control and minimize long-term morbidity, treatment must be individualized for children and adolescents with nonrhabdomyosarcomatous soft tissue sarcoma. These patients should be enrolled in prospective studies that accurately assess any potential complications.[4]

References

1. Smith MA, Altekruse SF, Adamson PC, et al.: Declining childhood and adolescent cancer mortality. Cancer 120 (16): 2497-506, 2014. [PUBMED Abstract]
2. American Academy of Pediatrics: Standards for pediatric cancer centers. Pediatrics 134 (2): 410-4, 2014. Also available online. Last accessed August 23, 2024.
3. Suit H, Spiro I: Radiation as a therapeutic modality in sarcomas of the soft tissue. Hematol Oncol Clin North Am 9 (4): 733-46, 1995. [PUBMED Abstract]
4. Hawkins DS, Black JO, Orbach D, et al.: Nonrhabdomyosarcoma soft-tissue sarcomas. In: Blaney SM, Helman LJ, Adamson PC, eds.: Pizzo and Poplack's Pediatric Oncology. 8th ed. Wolters Kluwer, 2020, pp 721-46.

Adipocytic tumors account for less than 10% of soft tissue lesions in patients younger than 20 years. The most common adipocytic tumors in children are lipomas and lipoblastomas.

Table 11 summarizes the adipocytic neoplasms seen in pediatric patients and includes information about their corresponding clinico-pathological and molecular features.[1]

References

1. Putra J, Al-Ibraheemi A: Adipocytic tumors in Children: A contemporary review. Semin Diagn Pathol 36 (2): 95-104, 2019. [PUBMED Abstract]
2. Coffin CM, Alaggio R: Adipose and myxoid tumors of childhood and adolescence. Pediatr Dev Pathol 15 (1 Suppl): 239-54, 2012. [PUBMED Abstract]
3. Dehner LP, Gru AA: Nonepithelial Tumors and Tumor-like Lesions of the Skin and Subcutis in Children. Pediatr Dev Pathol 21 (2): 150-207, 2018 Mar-Apr. [PUBMED Abstract]
4. Yozu M, Symmans P, Dray M, et al.: Muir-Torre syndrome-associated pleomorphic liposarcoma arising in a previous radiation field. Virchows Arch 462 (3): 355-60, 2013. [PUBMED Abstract]
5. Palit A, Inamadar AC: Circumferential skin folds in a child: a case of Michelin tire baby syndrome. Indian J Dermatol Venereol Leprol 73 (1): 49-51, 2007 Jan-Feb. [PUBMED Abstract]
6. Goucha S, Khaled A, Zéglaoui F, et al.: Nevus lipomatosus cutaneous superficialis: Report of eight cases. Dermatol Ther (Heidelb) 1 (2): 25-30, 2011. [PUBMED Abstract]
7. Ferrari A, Casanova M, Collini P, et al.: Adult-type soft tissue sarcomas in pediatric-age patients: experience at the Istituto Nazionale Tumori in Milan. J Clin Oncol 23 (18): 4021-30, 2005. [PUBMED Abstract]
8. Stanelle EJ, Christison-Lagay ER, Sidebotham EL, et al.: Prognostic factors and survival in pediatric and adolescent liposarcoma. Sarcoma 2012: 870910, 2012. [PUBMED Abstract]
9. Alaggio R, Coffin CM, Weiss SW, et al.: Liposarcomas in young patients: a study of 82 cases occurring in patients younger than 22 years of age. Am J Surg Pathol 33 (5): 645-58, 2009. [PUBMED Abstract]
10. Baday YI, Navai SA, Hicks MJ, et al.: Pediatric liposarcoma: A case series and literature review. Pediatr Blood Cancer 68 (12): e29327, 2021. [PUBMED Abstract]
11. Fletcher CDM, Bridge JA, Hogendoorn P, et al., eds.: WHO Classification of Tumours of Soft Tissue and Bone. 4th ed. IARC Press, 2013.
12. Sreekantaiah C, Karakousis CP, Leong SP, et al.: Cytogenetic findings in liposarcoma correlate with histopathologic subtypes. Cancer 69 (10): 2484-95, 1992. [PUBMED Abstract]
13. Kanojia D, Nagata Y, Garg M, et al.: Genomic landscape of liposarcoma. Oncotarget 6 (40): 42429-44, 2015. [PUBMED Abstract]
14. Powers MP, Wang WL, Hernandez VS, et al.: Detection of myxoid liposarcoma-associated FUS-DDIT3 rearrangement variants including a newly identified breakpoint using an optimized RT-PCR assay. Mod Pathol 23 (10): 1307-15, 2010. [PUBMED Abstract]
15. Han J, Murthy R, Wood B, et al.: ER stress signalling through eIF2α and CHOP, but not IRE1α, attenuates adipogenesis in mice. Diabetologia 56 (4): 911-24, 2013. [PUBMED Abstract]
16. Peng R, Li N, Lan T, et al.: Liposarcoma in children and young adults: a clinicopathologic and molecular study of 23 cases in one of the largest institutions of China. Virchows Arch 479 (3): 537-549, 2021. [PUBMED Abstract]
17. Barretina J, Taylor BS, Banerji S, et al.: Subtype-specific genomic alterations define new targets for soft-tissue sarcoma therapy. Nat Genet 42 (8): 715-21, 2010. [PUBMED Abstract]
18. Creytens D, Folpe AL, Koelsche C, et al.: Myxoid pleomorphic liposarcoma-a clinicopathologic, immunohistochemical, molecular genetic and epigenetic study of 12 cases, suggesting a possible relationship with conventional pleomorphic liposarcoma. Mod Pathol 34 (11): 2043-2049, 2021. [PUBMED Abstract]
19. Hofvander J, Jo VY, Ghanei I, et al.: Comprehensive genetic analysis of a paediatric pleomorphic myxoid liposarcoma reveals near-haploidization and loss of the RB1 gene. Histopathology 69 (1): 141-147, 2016. [PUBMED Abstract]
20. Sinclair TJ, Thorson CM, Alvarez E, et al.: Pleomorphic myxoid liposarcoma in an adolescent with Li-Fraumeni syndrome. Pediatr Surg Int 33 (5): 631-635, 2017. [PUBMED Abstract]
21. Francom CR, Leoniak SM, Lovell MA, et al.: Head and neck pleomorphic myxoid liposarcoma in a child with Li-Fraumeni syndrome. Int J Pediatr Otorhinolaryngol 123: 191-194, 2019. [PUBMED Abstract]
22. Zare SY, Leivo M, Fadare O: Recurrent Pleomorphic Myxoid Liposarcoma in a Patient With Li-Fraumeni Syndrome. Int J Surg Pathol 28 (2): 225-228, 2020. [PUBMED Abstract]
23. Sugiura H, Takahashi M, Katagiri H, et al.: Additional wide resection of malignant soft tissue tumors. Clin Orthop (394): 201-10, 2002. [PUBMED Abstract]
24. Cecchetto G, Guglielmi M, Inserra A, et al.: Primary re-excision: the Italian experience in patients with localized soft-tissue sarcomas. Pediatr Surg Int 17 (7): 532-4, 2001. [PUBMED Abstract]
25. Chui CH, Spunt SL, Liu T, et al.: Is reexcision in pediatric nonrhabdomyosarcoma soft tissue sarcoma necessary after an initial unplanned resection? J Pediatr Surg 37 (10): 1424-9, 2002. [PUBMED Abstract]
26. Bahig H, Roberge D, Bosch W, et al.: Agreement among RTOG sarcoma radiation oncologists in contouring suspicious peritumoral edema for preoperative radiation therapy of soft tissue sarcoma of the extremity. Int J Radiat Oncol Biol Phys 86 (2): 298-303, 2013. [PUBMED Abstract]
27. Baldini EH, Wang D, Haas RL, et al.: Treatment Guidelines for Preoperative Radiation Therapy for Retroperitoneal Sarcoma: Preliminary Consensus of an International Expert Panel. Int J Radiat Oncol Biol Phys 92 (3): 602-12, 2015. [PUBMED Abstract]
28. Samuels BL, Chawla SP, Somaiah N, et al.: Results of a prospective phase 2 study of pazopanib in patients with advanced intermediate-grade or high-grade liposarcoma. Cancer 123 (23): 4640-4647, 2017. [PUBMED Abstract]
29. La Quaglia MP, Spiro SA, Ghavimi F, et al.: Liposarcoma in patients younger than or equal to 22 years of age. Cancer 72 (10): 3114-9, 1993. [PUBMED Abstract]
30. Ferrari A, Casanova M, Spreafico F, et al.: Childhood liposarcoma: a single-institutional twenty-year experience. Pediatr Hematol Oncol 16 (5): 415-21, 1999 Sep-Oct. [PUBMED Abstract]
31. Cecchetto G, Alaggio R, Dall'Igna P, et al.: Localized unresectable non-rhabdo soft tissue sarcomas of the extremities in pediatric age: results from the Italian studies. Cancer 104 (9): 2006-12, 2005. [PUBMED Abstract]
32. Huh WW, Yuen C, Munsell M, et al.: Liposarcoma in children and young adults: a multi-institutional experience. Pediatr Blood Cancer 57 (7): 1142-6, 2011. [PUBMED Abstract]
33. Baruchel S, Pappo A, Krailo M, et al.: A phase 2 trial of trabectedin in children with recurrent rhabdomyosarcoma, Ewing sarcoma and non-rhabdomyosarcoma soft tissue sarcomas: a report from the Children's Oncology Group. Eur J Cancer 48 (4): 579-85, 2012. [PUBMED Abstract]
34. Gronchi A, Bui BN, Bonvalot S, et al.: Phase II clinical trial of neoadjuvant trabectedin in patients with advanced localized myxoid liposarcoma. Ann Oncol 23 (3): 771-6, 2012. [PUBMED Abstract]
35. Demetri GD, von Mehren M, Jones RL, et al.: Efficacy and Safety of Trabectedin or Dacarbazine for Metastatic Liposarcoma or Leiomyosarcoma After Failure of Conventional Chemotherapy: Results of a Phase III Randomized Multicenter Clinical Trial. J Clin Oncol 34 (8): 786-93, 2016. [PUBMED Abstract]
36. Demetri GD, Schöffski P, Grignani G, et al.: Activity of Eribulin in Patients With Advanced Liposarcoma Demonstrated in a Subgroup Analysis From a Randomized Phase III Study of Eribulin Versus Dacarbazine. J Clin Oncol 35 (30): 3433-3439, 2017. [PUBMED Abstract]
37. Schafer ES, Rau RE, Berg S, et al.: A phase 1 study of eribulin mesylate (E7389), a novel microtubule-targeting chemotherapeutic agent, in children with refractory or recurrent solid tumors: A Children's Oncology Group Phase 1 Consortium study (ADVL1314). Pediatr Blood Cancer 65 (8): e27066, 2018. [PUBMED Abstract]
38. Lee ATJ, Thway K, Huang PH, et al.: Clinical and Molecular Spectrum of Liposarcoma. J Clin Oncol 36 (2): 151-159, 2018. [PUBMED Abstract]
39. Beane JD, Yang JC, White D, et al.: Efficacy of adjuvant radiation therapy in the treatment of soft tissue sarcoma of the extremity: 20-year follow-up of a randomized prospective trial. Ann Surg Oncol 21 (8): 2484-9, 2014. [PUBMED Abstract]

Chondro-osseous tumors have several subtypes, including the following:

References

1. Wang L, Motoi T, Khanin R, et al.: Identification of a novel, recurrent HEY1-NCOA2 fusion in mesenchymal chondrosarcoma based on a genome-wide screen of exon-level expression data. Genes Chromosomes Cancer 51 (2): 127-39, 2012. [PUBMED Abstract]
2. Nyquist KB, Panagopoulos I, Thorsen J, et al.: Whole-transcriptome sequencing identifies novel IRF2BP2-CDX1 fusion gene brought about by translocation t(1;5)(q42;q32) in mesenchymal chondrosarcoma. PLoS One 7 (11): e49705, 2012. [PUBMED Abstract]
3. Xu B, Rooper LM, Dermawan JK, et al.: Mesenchymal chondrosarcoma of the head and neck with HEY1::NCOA2 fusion: A clinicopathologic and molecular study of 13 cases with emphasis on diagnostic pitfalls. Genes Chromosomes Cancer 61 (11): 670-677, 2022. [PUBMED Abstract]
4. Frezza AM, Cesari M, Baumhoer D, et al.: Mesenchymal chondrosarcoma: prognostic factors and outcome in 113 patients. A European Musculoskeletal Oncology Society study. Eur J Cancer 51 (3): 374-81, 2015. [PUBMED Abstract]
5. Schneiderman BA, Kliethermes SA, Nystrom LM: Survival in Mesenchymal Chondrosarcoma Varies Based on Age and Tumor Location: A Survival Analysis of the SEER Database. Clin Orthop Relat Res 475 (3): 799-805, 2017. [PUBMED Abstract]
6. Kawaguchi S, Weiss I, Lin PP, et al.: Radiation therapy is associated with fewer recurrences in mesenchymal chondrosarcoma. Clin Orthop Relat Res 472 (3): 856-64, 2014. [PUBMED Abstract]
7. Bahig H, Roberge D, Bosch W, et al.: Agreement among RTOG sarcoma radiation oncologists in contouring suspicious peritumoral edema for preoperative radiation therapy of soft tissue sarcoma of the extremity. Int J Radiat Oncol Biol Phys 86 (2): 298-303, 2013. [PUBMED Abstract]
8. Baldini EH, Wang D, Haas RL, et al.: Treatment Guidelines for Preoperative Radiation Therapy for Retroperitoneal Sarcoma: Preliminary Consensus of an International Expert Panel. Int J Radiat Oncol Biol Phys 92 (3): 602-12, 2015. [PUBMED Abstract]
9. Dantonello TM, Int-Veen C, Leuschner I, et al.: Mesenchymal chondrosarcoma of soft tissues and bone in children, adolescents, and young adults: experiences of the CWS and COSS study groups. Cancer 112 (11): 2424-31, 2008. [PUBMED Abstract]
10. Bishop MW, Somerville JM, Bahrami A, et al.: Mesenchymal Chondrosarcoma in Children and Young Adults: A Single Institution Retrospective Review. Sarcoma 2015: 608279, 2015. [PUBMED Abstract]
11. Morioka H, Takahashi S, Araki N, et al.: Results of sub-analysis of a phase 2 study on trabectedin treatment for extraskeletal myxoid chondrosarcoma and mesenchymal chondrosarcoma. BMC Cancer 16: 479, 2016. [PUBMED Abstract]
12. Jour G, Wang L, Middha S, et al.: The molecular landscape of extraskeletal osteosarcoma: A clinicopathological and molecular biomarker study. J Pathol Clin Res 2 (1): 9-20, 2016. [PUBMED Abstract]
13. Sordillo PP, Hajdu SI, Magill GB, et al.: Extraosseous osteogenic sarcoma. A review of 48 patients. Cancer 51 (4): 727-34, 1983. [PUBMED Abstract]
14. Paludo J, Fritchie K, Haddox CL, et al.: Extraskeletal Osteosarcoma: Outcomes and the Role of Chemotherapy. Am J Clin Oncol 41 (9): 832-837, 2018. [PUBMED Abstract]
15. Longhi A, Bielack SS, Grimer R, et al.: Extraskeletal osteosarcoma: A European Musculoskeletal Oncology Society study on 266 patients. Eur J Cancer 74: 9-16, 2017. [PUBMED Abstract]
16. Thampi S, Matthay KK, Boscardin WJ, et al.: Clinical Features and Outcomes Differ between Skeletal and Extraskeletal Osteosarcoma. Sarcoma 2014: 902620, 2014. [PUBMED Abstract]

Fibroblastic and myofibroblastic tumors have several subtypes, including the following:

References

1. Lewis JJ, Boland PJ, Leung DH, et al.: The enigma of desmoid tumors. Ann Surg 229 (6): 866-72; discussion 872-3, 1999. [PUBMED Abstract]
2. Gounder MM, Mahoney MR, Van Tine BA, et al.: Sorafenib for Advanced and Refractory Desmoid Tumors. N Engl J Med 379 (25): 2417-2428, 2018. [PUBMED Abstract]
3. Nieuwenhuis MH, Casparie M, Mathus-Vliegen LM, et al.: A nation-wide study comparing sporadic and familial adenomatous polyposis-related desmoid-type fibromatoses. Int J Cancer 129 (1): 256-61, 2011. [PUBMED Abstract]
4. Lazar AJ, Tuvin D, Hajibashi S, et al.: Specific mutations in the beta-catenin gene (CTNNB1) correlate with local recurrence in sporadic desmoid tumors. Am J Pathol 173 (5): 1518-27, 2008. [PUBMED Abstract]
5. Rossato M, Rigotti M, Grazia M, et al.: Congenital hypertrophy of the retinal pigment epithelium (CHRPE) and familial adenomatous polyposis (FAP). Acta Ophthalmol Scand 74 (4): 338-42, 1996. [PUBMED Abstract]
6. Baker RH, Heinemann MH, Miller HH, et al.: Hyperpigmented lesions of the retinal pigment epithelium in familial adenomatous polyposis. Am J Med Genet 31 (2): 427-35, 1988. [PUBMED Abstract]
7. Kattentidt Mouravieva AA, Geurts-Giele IR, de Krijger RR, et al.: Identification of Familial Adenomatous Polyposis carriers among children with desmoid tumours. Eur J Cancer 48 (12): 1867-74, 2012. [PUBMED Abstract]
8. Wang WL, Nero C, Pappo A, et al.: CTNNB1 genotyping and APC screening in pediatric desmoid tumors: a proposed algorithm. Pediatr Dev Pathol 15 (5): 361-7, 2012 Sep-Oct. [PUBMED Abstract]
9. Baday YI, Navai SA, Hicks MJ, et al.: Pediatric liposarcoma: A case series and literature review. Pediatr Blood Cancer 68 (12): e29327, 2021. [PUBMED Abstract]
10. Merchant NB, Lewis JJ, Woodruff JM, et al.: Extremity and trunk desmoid tumors: a multifactorial analysis of outcome. Cancer 86 (10): 2045-52, 1999. [PUBMED Abstract]
11. Faulkner LB, Hajdu SI, Kher U, et al.: Pediatric desmoid tumor: retrospective analysis of 63 cases. J Clin Oncol 13 (11): 2813-8, 1995. [PUBMED Abstract]
12. Honeyman JN, Theilen TM, Knowles MA, et al.: Desmoid fibromatosis in children and adolescents: a conservative approach to management. J Pediatr Surg 48 (1): 62-6, 2013. [PUBMED Abstract]
13. Bonvalot S, Ternès N, Fiore M, et al.: Spontaneous regression of primary abdominal wall desmoid tumors: more common than previously thought. Ann Surg Oncol 20 (13): 4096-102, 2013. [PUBMED Abstract]
14. Bonvalot S, Eldweny H, Haddad V, et al.: Extra-abdominal primary fibromatosis: Aggressive management could be avoided in a subgroup of patients. Eur J Surg Oncol 34 (4): 462-8, 2008. [PUBMED Abstract]
15. Merchant TE, Nguyen D, Walter AW, et al.: Long-term results with radiation therapy for pediatric desmoid tumors. Int J Radiat Oncol Biol Phys 47 (5): 1267-71, 2000. [PUBMED Abstract]
16. Zelefsky MJ, Harrison LB, Shiu MH, et al.: Combined surgical resection and iridium 192 implantation for locally advanced and recurrent desmoid tumors. Cancer 67 (2): 380-4, 1991. [PUBMED Abstract]
17. Weiss AJ, Lackman RD: Low-dose chemotherapy of desmoid tumors. Cancer 64 (6): 1192-4, 1989. [PUBMED Abstract]
18. Klein WA, Miller HH, Anderson M, et al.: The use of indomethacin, sulindac, and tamoxifen for the treatment of desmoid tumors associated with familial polyposis. Cancer 60 (12): 2863-8, 1987. [PUBMED Abstract]
19. Soto-Miranda MA, Sandoval JA, Rao B, et al.: Surgical treatment of pediatric desmoid tumors. A 12-year, single-center experience. Ann Surg Oncol 20 (11): 3384-90, 2013. [PUBMED Abstract]
20. Desmoid Tumor Working Group: The management of desmoid tumours: A joint global consensus-based guideline approach for adult and paediatric patients. Eur J Cancer 127: 96-107, 2020. [PUBMED Abstract]
21. Penel N, Le Cesne A, Bonvalot S, et al.: Surgical versus non-surgical approach in primary desmoid-type fibromatosis patients: A nationwide prospective cohort from the French Sarcoma Group. Eur J Cancer 83: 125-131, 2017. [PUBMED Abstract]
22. Orbach D, Brennan B, Bisogno G, et al.: The EpSSG NRSTS 2005 treatment protocol for desmoid-type fibromatosis in children: an international prospective case series. Lancet Child Adolesc Health 1 (4): 284-292, 2017. [PUBMED Abstract]
23. Skapek SX, Ferguson WS, Granowetter L, et al.: Vinblastine and methotrexate for desmoid fibromatosis in children: results of a Pediatric Oncology Group Phase II Trial. J Clin Oncol 25 (5): 501-6, 2007. [PUBMED Abstract]
24. Gega M, Yanagi H, Yoshikawa R, et al.: Successful chemotherapeutic modality of doxorubicin plus dacarbazine for the treatment of desmoid tumors in association with familial adenomatous polyposis. J Clin Oncol 24 (1): 102-5, 2006. [PUBMED Abstract]
25. Constantinidou A, Jones RL, Scurr M, et al.: Pegylated liposomal doxorubicin, an effective, well-tolerated treatment for refractory aggressive fibromatosis. Eur J Cancer 45 (17): 2930-4, 2009. [PUBMED Abstract]
26. Ananth P, Werger A, Voss S, et al.: Liposomal doxorubicin: Effective treatment for pediatric desmoid fibromatosis. Pediatr Blood Cancer 64 (7): , 2017. [PUBMED Abstract]
27. Ferrari A, Orbach D, Affinita MC, et al.: Evidence of hydroxyurea activity in children with pretreated desmoid-type fibromatosis: A new option in the armamentarium of systemic therapies. Pediatr Blood Cancer 66 (1): e27472, 2019. [PUBMED Abstract]
28. Kornreich L, Orbach D, Nicolas N, et al.: Oral vinorelbine in young patients with desmoid-type fibromatosis. Tumori 109 (5): 511-518, 2023. [PUBMED Abstract]
29. Agresta L, Kim H, Turpin BK, et al.: Pazopanib therapy for desmoid tumors in adolescent and young adult patients. Pediatr Blood Cancer 65 (6): e26968, 2018. [PUBMED Abstract]
30. Toulmonde M, Pulido M, Ray-Coquard I, et al.: Pazopanib or methotrexate-vinblastine combination chemotherapy in adult patients with progressive desmoid tumours (DESMOPAZ): a non-comparative, randomised, open-label, multicentre, phase 2 study. Lancet Oncol 20 (9): 1263-1272, 2019. [PUBMED Abstract]
31. Shang H, Braggio D, Lee YJ, et al.: Targeting the Notch pathway: A potential therapeutic approach for desmoid tumors. Cancer 121 (22): 4088-96, 2015. [PUBMED Abstract]
32. Kummar S, O'Sullivan Coyne G, Do KT, et al.: Clinical Activity of the γ-Secretase Inhibitor PF-03084014 in Adults With Desmoid Tumors (Aggressive Fibromatosis). J Clin Oncol 35 (14): 1561-1569, 2017. [PUBMED Abstract]
33. Gounder M, Ratan R, Alcindor T, et al.: Nirogacestat, a γ-Secretase Inhibitor for Desmoid Tumors. N Engl J Med 388 (10): 898-912, 2023. [PUBMED Abstract]
34. Takahashi T, Prensner JR, Robson CD, et al.: Safety and efficacy of gamma-secretase inhibitor nirogacestat (PF-03084014) in desmoid tumor: Report of four pediatric/young adult cases. Pediatr Blood Cancer 67 (10): e28636, 2020. [PUBMED Abstract]
35. Meazza C, Bisogno G, Gronchi A, et al.: Aggressive fibromatosis in children and adolescents: the Italian experience. Cancer 116 (1): 233-40, 2010. [PUBMED Abstract]
36. Hansmann A, Adolph C, Vogel T, et al.: High-dose tamoxifen and sulindac as first-line treatment for desmoid tumors. Cancer 100 (3): 612-20, 2004. [PUBMED Abstract]
37. Skapek SX, Anderson JR, Hill DA, et al.: Safety and efficacy of high-dose tamoxifen and sulindac for desmoid tumor in children: results of a Children's Oncology Group (COG) phase II study. Pediatr Blood Cancer 60 (7): 1108-12, 2013. [PUBMED Abstract]
38. Rutenberg MS, Indelicato DJ, Knapik JA, et al.: External-beam radiotherapy for pediatric and young adult desmoid tumors. Pediatr Blood Cancer 57 (3): 435-42, 2011. [PUBMED Abstract]
39. Buckley PG, Mantripragada KK, Benetkiewicz M, et al.: A full-coverage, high-resolution human chromosome 22 genomic microarray for clinical and research applications. Hum Mol Genet 11 (25): 3221-9, 2002. [PUBMED Abstract]
40. Valdivielso-Ramos M, Torrelo A, Campos M, et al.: Pediatric dermatofibrosarcoma protuberans in Madrid, Spain: multi-institutional outcomes. Pediatr Dermatol 31 (6): 676-82, 2014 Nov-Dec. [PUBMED Abstract]
41. Gooskens SL, Oranje AP, van Adrichem LN, et al.: Imatinib mesylate for children with dermatofibrosarcoma protuberans (DFSP). Pediatr Blood Cancer 55 (2): 369-73, 2010. [PUBMED Abstract]
42. Rubio GA, Alvarado A, Gerth DJ, et al.: Incidence and Outcomes of Dermatofibrosarcoma Protuberans in the US Pediatric Population. J Craniofac Surg 28 (1): 182-184, 2017. [PUBMED Abstract]
43. Miller SJ, Alam M, Andersen JS, et al.: Dermatofibrosarcoma protuberans. J Natl Compr Canc Netw 10 (3): 312-8, 2012. [PUBMED Abstract]
44. Meguerditchian AN, Wang J, Lema B, et al.: Wide excision or Mohs micrographic surgery for the treatment of primary dermatofibrosarcoma protuberans. Am J Clin Oncol 33 (3): 300-3, 2010. [PUBMED Abstract]
45. Brennan B, Zanetti I, De Salvo GL, et al.: Dermatofibrosarcoma protuberans in children and adolescents: The European Paediatric Soft Tissue Sarcoma Study Group prospective trial (EpSSG NRSTS 2005). Pediatr Blood Cancer 67 (10): e28351, 2020. [PUBMED Abstract]
46. Dagan R, Morris CG, Zlotecki RA, et al.: Radiotherapy in the treatment of dermatofibrosarcoma protuberans. Am J Clin Oncol 28 (6): 537-9, 2005. [PUBMED Abstract]
47. Sun LM, Wang CJ, Huang CC, et al.: Dermatofibrosarcoma protuberans: treatment results of 35 cases. Radiother Oncol 57 (2): 175-81, 2000. [PUBMED Abstract]
48. Price VE, Fletcher JA, Zielenska M, et al.: Imatinib mesylate: an attractive alternative in young children with large, surgically challenging dermatofibrosarcoma protuberans. Pediatr Blood Cancer 44 (5): 511-5, 2005. [PUBMED Abstract]
49. McArthur GA, Demetri GD, van Oosterom A, et al.: Molecular and clinical analysis of locally advanced dermatofibrosarcoma protuberans treated with imatinib: Imatinib Target Exploration Consortium Study B2225. J Clin Oncol 23 (4): 866-73, 2005. [PUBMED Abstract]
50. Rutkowski P, Van Glabbeke M, Rankin CJ, et al.: Imatinib mesylate in advanced dermatofibrosarcoma protuberans: pooled analysis of two phase II clinical trials. J Clin Oncol 28 (10): 1772-9, 2010. [PUBMED Abstract]
51. Navarrete-Dechent C, Mori S, Barker CA, et al.: Imatinib Treatment for Locally Advanced or Metastatic Dermatofibrosarcoma Protuberans: A Systematic Review. JAMA Dermatol 155 (3): 361-369, 2019. [PUBMED Abstract]
52. Kovach SJ, Fischer AC, Katzman PJ, et al.: Inflammatory myofibroblastic tumors. J Surg Oncol 94 (5): 385-91, 2006. [PUBMED Abstract]
53. Brodlie M, Barwick SC, Wood KM, et al.: Inflammatory myofibroblastic tumours of the respiratory tract: paediatric case series with varying clinical presentations. J Laryngol Otol 125 (8): 865-8, 2011. [PUBMED Abstract]
54. Xiao Y, Zhou S, Ma C, et al.: Radiological and histopathological features of hepatic inflammatory myofibroblastic tumour: analysis of 10 cases. Clin Radiol 68 (11): 1114-20, 2013. [PUBMED Abstract]
55. Karnak I, Senocak ME, Ciftci AO, et al.: Inflammatory myofibroblastic tumor in children: diagnosis and treatment. J Pediatr Surg 36 (6): 908-12, 2001. [PUBMED Abstract]
56. Collin M, Charles A, Barker A, et al.: Inflammatory myofibroblastic tumour of the bladder in children: a review. J Pediatr Urol 11 (5): 239-45, 2015. [PUBMED Abstract]
57. Mariño-Enríquez A, Wang WL, Roy A, et al.: Epithelioid inflammatory myofibroblastic sarcoma: An aggressive intra-abdominal variant of inflammatory myofibroblastic tumor with nuclear membrane or perinuclear ALK. Am J Surg Pathol 35 (1): 135-44, 2011. [PUBMED Abstract]
58. Lee JC, Li CF, Huang HY, et al.: ALK oncoproteins in atypical inflammatory myofibroblastic tumours: novel RRBP1-ALK fusions in epithelioid inflammatory myofibroblastic sarcoma. J Pathol 241 (3): 316-323, 2017. [PUBMED Abstract]
59. Trahair T, Gifford AJ, Fordham A, et al.: Crizotinib and Surgery for Long-Term Disease Control in Children and Adolescents With ALK-Positive Inflammatory Myofibroblastic Tumors. JCO Precis Oncol 3: , 2019. [PUBMED Abstract]
60. Coffin CM, Hornick JL, Fletcher CD: Inflammatory myofibroblastic tumor: comparison of clinicopathologic, histologic, and immunohistochemical features including ALK expression in atypical and aggressive cases. Am J Surg Pathol 31 (4): 509-20, 2007. [PUBMED Abstract]
61. Lovly CM, Gupta A, Lipson D, et al.: Inflammatory myofibroblastic tumors harbor multiple potentially actionable kinase fusions. Cancer Discov 4 (8): 889-95, 2014. [PUBMED Abstract]
62. Casanova M, Brennan B, Alaggio R, et al.: Inflammatory myofibroblastic tumor: The experience of the European pediatric Soft Tissue Sarcoma Study Group (EpSSG). Eur J Cancer 127: 123-129, 2020. [PUBMED Abstract]
63. Yu L, Liu J, Lao IW, et al.: Epithelioid inflammatory myofibroblastic sarcoma: a clinicopathological, immunohistochemical and molecular cytogenetic analysis of five additional cases and review of the literature. Diagn Pathol 11 (1): 67, 2016. [PUBMED Abstract]
64. Devaney KO, Lafeir DJ, Triantafyllou A, et al.: Inflammatory myofibroblastic tumors of the head and neck: evaluation of clinicopathologic and prognostic features. Eur Arch Otorhinolaryngol 269 (12): 2461-5, 2012. [PUBMED Abstract]
65. Mehta B, Mascarenhas L, Zhou S, et al.: Inflammatory myofibroblastic tumors in childhood. Pediatr Hematol Oncol 30 (7): 640-5, 2013. [PUBMED Abstract]
66. Kube S, Vokuhl C, Dantonello T, et al.: Inflammatory myofibroblastic tumors-A retrospective analysis of the Cooperative Weichteilsarkom Studiengruppe. Pediatr Blood Cancer 65 (6): e27012, 2018. [PUBMED Abstract]
67. Dalton BG, Thomas PG, Sharp NE, et al.: Inflammatory myofibroblastic tumors in children. J Pediatr Surg 51 (4): 541-4, 2016. [PUBMED Abstract]
68. Favini F, Resti AG, Collini P, et al.: Inflammatory myofibroblastic tumor of the conjunctiva: response to chemotherapy with low-dose methotrexate and vinorelbine. Pediatr Blood Cancer 54 (3): 483-5, 2010. [PUBMED Abstract]
69. Schoot RA, Orbach D, Minard Colin V, et al.: Inflammatory Myofibroblastic Tumor With ROS1 Gene Fusions in Children and Young Adolescents. JCO Precis Oncol 7: e2300323, 2023. [PUBMED Abstract]
70. Doski JJ, Priebe CJ, Driessnack M, et al.: Corticosteroids in the management of unresected plasma cell granuloma (inflammatory pseudotumor) of the lung. J Pediatr Surg 26 (9): 1064-6, 1991. [PUBMED Abstract]
71. Diop B, Konate I, Ka S, et al.: Mesenteric myofibroblastic tumor: NSAID therapy after incomplete resection. J Visc Surg 148 (4): e311-4, 2011. [PUBMED Abstract]
72. Mossé YP, Lim MS, Voss SD, et al.: Safety and activity of crizotinib for paediatric patients with refractory solid tumours or anaplastic large-cell lymphoma: a Children's Oncology Group phase 1 consortium study. Lancet Oncol 14 (6): 472-80, 2013. [PUBMED Abstract]
73. Gaudichon J, Jeanne-Pasquier C, Deparis M, et al.: Complete and Repeated Response of a Metastatic ALK-rearranged Inflammatory Myofibroblastic Tumor to Crizotinib in a Teenage Girl. J Pediatr Hematol Oncol 38 (4): 308-11, 2016. [PUBMED Abstract]
74. Mossé YP, Voss SD, Lim MS, et al.: Targeting ALK With Crizotinib in Pediatric Anaplastic Large Cell Lymphoma and Inflammatory Myofibroblastic Tumor: A Children's Oncology Group Study. J Clin Oncol 35 (28): 3215-3221, 2017. [PUBMED Abstract]
75. Butrynski JE, D'Adamo DR, Hornick JL, et al.: Crizotinib in ALK-rearranged inflammatory myofibroblastic tumor. N Engl J Med 363 (18): 1727-33, 2010. [PUBMED Abstract]
76. Nakano K: Inflammatory myofibroblastic tumors: recent progress and future of targeted therapy. Jpn J Clin Oncol 53 (10): 885-892, 2023. [PUBMED Abstract]
77. Brivio E, Zwaan CM: ALK inhibition in two emblematic cases of pediatric inflammatory myofibroblastic tumor: Efficacy and side effects. Pediatr Blood Cancer 66 (5): e27645, 2019. [PUBMED Abstract]
78. Fischer M, Moreno L, Ziegler DS, et al.: Ceritinib in paediatric patients with anaplastic lymphoma kinase-positive malignancies: an open-label, multicentre, phase 1, dose-escalation and dose-expansion study. Lancet Oncol 22 (12): 1764-1776, 2021. [PUBMED Abstract]
79. Nishio M, Murakami H, Horiike A, et al.: Phase I Study of Ceritinib (LDK378) in Japanese Patients with Advanced, Anaplastic Lymphoma Kinase-Rearranged Non-Small-Cell Lung Cancer or Other Tumors. J Thorac Oncol 10 (7): 1058-66, 2015. [PUBMED Abstract]
80. Fujiki T, Sakai Y, Ikawa Y, et al.: Pediatric inflammatory myofibroblastic tumor of the bladder with ALK-FN1 fusion successfully treated by alectinib. Pediatr Blood Cancer 70 (4): e30172, 2023. [PUBMED Abstract]
81. Gounder MM, Agaram NP, Trabucco SE, et al.: Clinical genomic profiling in the management of patients with soft tissue and bone sarcoma. Nat Commun 13 (1): 3406, 2022. [PUBMED Abstract]
82. Sulkowski JP, Raval MV, Browne M: Margin status and multimodal therapy in infantile fibrosarcoma. Pediatr Surg Int 29 (8): 771-6, 2013. [PUBMED Abstract]
83. Hirschfeld R, Welch JJG, Harrison DJ, et al.: Two cases of humoral hypercalcemia of malignancy complicating infantile fibrosarcoma. Pediatr Blood Cancer 64 (10): , 2017. [PUBMED Abstract]
84. Kao YC, Fletcher CDM, Alaggio R, et al.: Recurrent BRAF Gene Fusions in a Subset of Pediatric Spindle Cell Sarcomas: Expanding the Genetic Spectrum of Tumors With Overlapping Features With Infantile Fibrosarcoma. Am J Surg Pathol 42 (1): 28-38, 2018. [PUBMED Abstract]
85. Wegert J, Vokuhl C, Collord G, et al.: Recurrent intragenic rearrangements of EGFR and BRAF in soft tissue tumors of infants. Nat Commun 9 (1): 2378, 2018. [PUBMED Abstract]
86. Tan SY, Al-Ibraheemi A, Ahrens WA, et al.: ALK rearrangements in infantile fibrosarcoma-like spindle cell tumours of soft tissue and kidney. Histopathology 80 (4): 698-707, 2022. [PUBMED Abstract]
87. Motta M, Barresi S, Pizzi S, et al.: RAF1 gene fusions are recurrent driver events in infantile fibrosarcoma-like mesenchymal tumors. J Pathol 263 (2): 166-177, 2024. [PUBMED Abstract]
88. Orbach D, Rey A, Cecchetto G, et al.: Infantile fibrosarcoma: management based on the European experience. J Clin Oncol 28 (2): 318-23, 2010. [PUBMED Abstract]
89. Orbach D, Brennan B, De Paoli A, et al.: Conservative strategy in infantile fibrosarcoma is possible: The European paediatric Soft tissue sarcoma Study Group experience. Eur J Cancer 57: 1-9, 2016. [PUBMED Abstract]
90. Hawkins DS, Black JO, Orbach D, et al.: Nonrhabdomyosarcoma soft-tissue sarcomas. In: Blaney SM, Helman LJ, Adamson PC, eds.: Pizzo and Poplack's Pediatric Oncology. 8th ed. Wolters Kluwer, 2020, pp 721-46.
91. Loh ML, Ahn P, Perez-Atayde AR, et al.: Treatment of infantile fibrosarcoma with chemotherapy and surgery: results from the Dana-Farber Cancer Institute and Children's Hospital, Boston. J Pediatr Hematol Oncol 24 (9): 722-6, 2002. [PUBMED Abstract]
92. Akyüz C, Küpeli S, Varan A, et al.: Infantile fibrosarcoma: retrospective analysis of eleven patients. Tumori 97 (2): 166-9, 2011 Mar-Apr. [PUBMED Abstract]
93. Gallego S, Pericas N, Barber I, et al.: Infantile fibrosarcoma of the retroperitoneum: a site of unfavorable prognosis? Pediatr Hematol Oncol 28 (5): 451-3, 2011. [PUBMED Abstract]
94. Parida L, Fernandez-Pineda I, Uffman JK, et al.: Clinical management of infantile fibrosarcoma: a retrospective single-institution review. Pediatr Surg Int 29 (7): 703-8, 2013. [PUBMED Abstract]
95. Laetsch TW, DuBois SG, Mascarenhas L, et al.: Larotrectinib for paediatric solid tumours harbouring NTRK gene fusions: phase 1 results from a multicentre, open-label, phase 1/2 study. Lancet Oncol 19 (5): 705-714, 2018. [PUBMED Abstract]
96. Kummar S, Lassen UN: TRK Inhibition: A New Tumor-Agnostic Treatment Strategy. Target Oncol 13 (5): 545-556, 2018. [PUBMED Abstract]
97. Drilon A, Laetsch TW, Kummar S, et al.: Efficacy of Larotrectinib in TRK Fusion-Positive Cancers in Adults and Children. N Engl J Med 378 (8): 731-739, 2018. [PUBMED Abstract]
98. DuBois SG, Laetsch TW, Federman N, et al.: The use of neoadjuvant larotrectinib in the management of children with locally advanced TRK fusion sarcomas. Cancer 124 (21): 4241-4247, 2018. [PUBMED Abstract]
99. Hong DS, DuBois SG, Kummar S, et al.: Larotrectinib in patients with TRK fusion-positive solid tumours: a pooled analysis of three phase 1/2 clinical trials. Lancet Oncol 21 (4): 531-540, 2020. [PUBMED Abstract]
100. Drilon A, Nagasubramanian R, Blake JF, et al.: A Next-Generation TRK Kinase Inhibitor Overcomes Acquired Resistance to Prior TRK Kinase Inhibition in Patients with TRK Fusion-Positive Solid Tumors. Cancer Discov 7 (9): 963-972, 2017. [PUBMED Abstract]
101. Yanagisawa R, Noguchi M, Fujita K, et al.: Preoperative Treatment With Pazopanib in a Case of Chemotherapy-Resistant Infantile Fibrosarcoma. Pediatr Blood Cancer 63 (2): 348-51, 2016. [PUBMED Abstract]
102. Evans HL: Low-grade fibromyxoid sarcoma: a clinicopathologic study of 33 cases with long-term follow-up. Am J Surg Pathol 35 (10): 1450-62, 2011. [PUBMED Abstract]
103. Scheer M, Vokuhl C, Veit-Friedrich I, et al.: Low-grade fibromyxoid sarcoma: A report of the Cooperative Weichteilsarkom Studiengruppe (CWS). Pediatr Blood Cancer 67 (2): e28009, 2020. [PUBMED Abstract]
104. Fletcher CDM, Bridge JA, Hogendoorn P, et al., eds.: WHO Classification of Tumours of Soft Tissue and Bone. 4th ed. IARC Press, 2013.
105. Sargar K, Kao SC, Spunt SL, et al.: MRI and CT of Low-Grade Fibromyxoid Sarcoma in Children: A Report From Children's Oncology Group Study ARST0332. AJR Am J Roentgenol 205 (2): 414-20, 2015. [PUBMED Abstract]
106. Guillou L, Benhattar J, Gengler C, et al.: Translocation-positive low-grade fibromyxoid sarcoma: clinicopathologic and molecular analysis of a series expanding the morphologic spectrum and suggesting potential relationship to sclerosing epithelioid fibrosarcoma: a study from the French Sarcoma Group. Am J Surg Pathol 31 (9): 1387-402, 2007. [PUBMED Abstract]
107. Mohamed M, Fisher C, Thway K: Low-grade fibromyxoid sarcoma: Clinical, morphologic and genetic features. Ann Diagn Pathol 28: 60-67, 2017. [PUBMED Abstract]
108. O'Sullivan MJ, Sirgi KE, Dehner LP: Low-grade fibrosarcoma (hyalinizing spindle cell tumor with giant rosettes) with pulmonary metastases at presentation: case report and review of the literature. Int J Surg Pathol 10 (3): 211-6, 2002. [PUBMED Abstract]
109. Folpe AL, Lane KL, Paull G, et al.: Low-grade fibromyxoid sarcoma and hyalinizing spindle cell tumor with giant rosettes: a clinicopathologic study of 73 cases supporting their identity and assessing the impact of high-grade areas. Am J Surg Pathol 24 (10): 1353-60, 2000. [PUBMED Abstract]
110. Maretty-Nielsen K, Baerentzen S, Keller J, et al.: Low-Grade Fibromyxoid Sarcoma: Incidence, Treatment Strategy of Metastases, and Clinical Significance of the FUS Gene. Sarcoma 2013: 256280, 2013. [PUBMED Abstract]
111. Prieto-Granada C, Zhang L, Chen HW, et al.: A genetic dichotomy between pure sclerosing epithelioid fibrosarcoma (SEF) and hybrid SEF/low-grade fibromyxoid sarcoma: a pathologic and molecular study of 18 cases. Genes Chromosomes Cancer 54 (1): 28-38, 2015. [PUBMED Abstract]
112. Arbajian E, Puls F, Antonescu CR, et al.: In-depth Genetic Analysis of Sclerosing Epithelioid Fibrosarcoma Reveals Recurrent Genomic Alterations and Potential Treatment Targets. Clin Cancer Res 23 (23): 7426-7434, 2017. [PUBMED Abstract]
113. Arbajian E, Puls F, Magnusson L, et al.: Recurrent EWSR1-CREB3L1 gene fusions in sclerosing epithelioid fibrosarcoma. Am J Surg Pathol 38 (6): 801-8, 2014. [PUBMED Abstract]
114. Dewaele B, Libbrecht L, Levy G, et al.: A novel EWS-CREB3L3 gene fusion in a mesenteric sclerosing epithelioid fibrosarcoma. Genes Chromosomes Cancer 56 (9): 695-699, 2017. [PUBMED Abstract]
115. Porteus C, Gan Q, Gong Y, et al.: Sclerosing epithelioid fibrosarcoma: cytologic characterization with histologic, immunohistologic, molecular, and clinical correlation of 8 cases. J Am Soc Cytopathol 9 (6): 513-519, 2020 Nov - Dec. [PUBMED Abstract]
116. Puls F, Agaimy A, Flucke U, et al.: Recurrent Fusions Between YAP1 and KMT2A in Morphologically Distinct Neoplasms Within the Spectrum of Low-grade Fibromyxoid Sarcoma and Sclerosing Epithelioid Fibrosarcoma. Am J Surg Pathol 44 (5): 594-606, 2020. [PUBMED Abstract]
117. Warmke LM, Meis JM: Sclerosing Epithelioid Fibrosarcoma: A Distinct Sarcoma With Aggressive Features. Am J Surg Pathol 45 (3): 317-328, 2021. [PUBMED Abstract]
118. Chew W, Benson C, Thway K, et al.: Clinical Characteristics and efficacy of chemotherapy in sclerosing epithelioid fibrosarcoma. Med Oncol 35 (11): 138, 2018. [PUBMED Abstract]

Skeletal muscle tumors have several subtypes, including the following:

References

1. Huang SC, Alaggio R, Sung YS, et al.: Frequent HRAS Mutations in Malignant Ectomesenchymoma: Overlapping Genetic Abnormalities With Embryonal Rhabdomyosarcoma. Am J Surg Pathol 40 (7): 876-85, 2016. [PUBMED Abstract]
2. Griffin BB, Chou PM, George D, et al.: Malignant Ectomesenchymoma: Series Analysis of a Histologically and Genetically Heterogeneous Tumor. Int J Surg Pathol 26 (3): 200-212, 2018. [PUBMED Abstract]
3. Dantonello TM, Leuschner I, Vokuhl C, et al.: Malignant ectomesenchymoma in children and adolescents: report from the Cooperative Weichteilsarkom Studiengruppe (CWS). Pediatr Blood Cancer 60 (2): 224-9, 2013. [PUBMED Abstract]
4. Milano GM, Orbach D, Casanova M, et al.: Malignant ectomesenchymoma in children: The European pediatric Soft tissue sarcoma Study Group experience. Pediatr Blood Cancer 70 (2): e30116, 2023. [PUBMED Abstract]

References

1. Pollock BH, Jenson HB, Leach CT, et al.: Risk factors for pediatric human immunodeficiency virus-related malignancy. JAMA 289 (18): 2393-9, 2003. [PUBMED Abstract]
2. Kleinerman RA, Tucker MA, Abramson DH, et al.: Risk of soft tissue sarcomas by individual subtype in survivors of hereditary retinoblastoma. J Natl Cancer Inst 99 (1): 24-31, 2007. [PUBMED Abstract]
3. Samuels BL, Chawla S, Patel S, et al.: Clinical outcomes and safety with trabectedin therapy in patients with advanced soft tissue sarcomas following failure of prior chemotherapy: results of a worldwide expanded access program study. Ann Oncol 24 (6): 1703-9, 2013. [PUBMED Abstract]
4. Demetri GD, von Mehren M, Jones RL, et al.: Efficacy and Safety of Trabectedin or Dacarbazine for Metastatic Liposarcoma or Leiomyosarcoma After Failure of Conventional Chemotherapy: Results of a Phase III Randomized Multicenter Clinical Trial. J Clin Oncol 34 (8): 786-93, 2016. [PUBMED Abstract]
5. Pautier P, Italiano A, Piperno-Neumann S, et al.: Doxorubicin-Trabectedin with Trabectedin Maintenance in Leiomyosarcoma. N Engl J Med 391 (9): 789-799, 2024. [PUBMED Abstract]

References

1. Enzinger FM, Zhang RY: Plexiform fibrohistiocytic tumor presenting in children and young adults. An analysis of 65 cases. Am J Surg Pathol 12 (11): 818-26, 1988. [PUBMED Abstract]
2. Black J, Coffin CM, Dehner LP: Fibrohistiocytic tumors and related neoplasms in children and adolescents. Pediatr Dev Pathol 15 (1 Suppl): 181-210, 2012. [PUBMED Abstract]
3. Moosavi C, Jha P, Fanburg-Smith JC: An update on plexiform fibrohistiocytic tumor and addition of 66 new cases from the Armed Forces Institute of Pathology, in honor of Franz M. Enzinger, MD. Ann Diagn Pathol 11 (5): 313-9, 2007. [PUBMED Abstract]
4. Billings SD, Folpe AL: Cutaneous and subcutaneous fibrohistiocytic tumors of intermediate malignancy: an update. Am J Dermatopathol 26 (2): 141-55, 2004. [PUBMED Abstract]
5. Remstein ED, Arndt CA, Nascimento AG: Plexiform fibrohistiocytic tumor: clinicopathologic analysis of 22 cases. Am J Surg Pathol 23 (6): 662-70, 1999. [PUBMED Abstract]
6. Salomao DR, Nascimento AG: Plexiform fibrohistiocytic tumor with systemic metastases: a case report. Am J Surg Pathol 21 (4): 469-76, 1997. [PUBMED Abstract]
7. Redlich GC, Montgomery KD, Allgood GA, et al.: Plexiform fibrohistiocytic tumor with a clonal cytogenetic anomaly. Cancer Genet Cytogenet 108 (2): 141-3, 1999. [PUBMED Abstract]
8. Luzar B, Calonje E: Cutaneous fibrohistiocytic tumours - an update. Histopathology 56 (1): 148-65, 2010. [PUBMED Abstract]

Peripheral nerve sheath tumors have several subtypes, including the following:

References

1. Carli M, Ferrari A, Mattke A, et al.: Pediatric malignant peripheral nerve sheath tumor: the Italian and German soft tissue sarcoma cooperative group. J Clin Oncol 23 (33): 8422-30, 2005. [PUBMED Abstract]
2. Malbari F, Spira M, B Knight P, et al.: Malignant Peripheral Nerve Sheath Tumors in Neurofibromatosis: Impact of Family History. J Pediatr Hematol Oncol 40 (6): e359-e363, 2018. [PUBMED Abstract]
3. Agresta L, Salloum R, Hummel TR, et al.: Malignant peripheral nerve sheath tumor: Transformation in a patient with neurofibromatosis type 2. Pediatr Blood Cancer 66 (2): e27520, 2019. [PUBMED Abstract]
4. Agaram NP, Wexler LH, Chi P, et al.: Malignant peripheral nerve sheath tumor in children: A clinicopathologic and molecular study with parallels to the adult counterpart. Genes Chromosomes Cancer 62 (3): 131-138, 2023. [PUBMED Abstract]
5. Zhang M, Wang Y, Jones S, et al.: Somatic mutations of SUZ12 in malignant peripheral nerve sheath tumors. Nat Genet 46 (11): 1170-2, 2014. [PUBMED Abstract]
6. Röhrich M, Koelsche C, Schrimpf D, et al.: Methylation-based classification of benign and malignant peripheral nerve sheath tumors. Acta Neuropathol 131 (6): 877-87, 2016. [PUBMED Abstract]
7. Kaplan HG, Rostad S, Ross JS, et al.: Genomic Profiling in Patients With Malignant Peripheral Nerve Sheath Tumors Reveals Multiple Pathways With Targetable Mutations. J Natl Compr Canc Netw 16 (8): 967-974, 2018. [PUBMED Abstract]
8. Hagel C, Zils U, Peiper M, et al.: Histopathology and clinical outcome of NF1-associated vs. sporadic malignant peripheral nerve sheath tumors. J Neurooncol 82 (2): 187-92, 2007. [PUBMED Abstract]
9. Zou C, Smith KD, Liu J, et al.: Clinical, pathological, and molecular variables predictive of malignant peripheral nerve sheath tumor outcome. Ann Surg 249 (6): 1014-22, 2009. [PUBMED Abstract]
10. Okada K, Hasegawa T, Tajino T, et al.: Clinical relevance of pathological grades of malignant peripheral nerve sheath tumor: a multi-institution TMTS study of 56 cases in Northern Japan. Ann Surg Oncol 14 (2): 597-604, 2007. [PUBMED Abstract]
11. Amirian ES, Goodman JC, New P, et al.: Pediatric and adult malignant peripheral nerve sheath tumors: an analysis of data from the surveillance, epidemiology, and end results program. J Neurooncol 116 (3): 609-16, 2014. [PUBMED Abstract]
12. Valentin T, Le Cesne A, Ray-Coquard I, et al.: Management and prognosis of malignant peripheral nerve sheath tumors: The experience of the French Sarcoma Group (GSF-GETO). Eur J Cancer 56: 77-84, 2016. [PUBMED Abstract]
13. Høland M, Kolberg M, Danielsen SA, et al.: Inferior survival for patients with malignant peripheral nerve sheath tumors defined by aberrant TP53. Mod Pathol 31 (11): 1694-1707, 2018. [PUBMED Abstract]
14. Krawczyk MA, Karpinsky G, Izycka-Swieszewska E, et al.: Immunohistochemical assessment of cyclin D1 and p53 is associated with survival in childhood malignant peripheral nerve sheath tumor. Cancer Biomark 24 (3): 351-361, 2019. [PUBMED Abstract]
15. Akshintala S, Mallory NC, Lu Y, et al.: Outcome of Patients With Malignant Peripheral Nerve Sheath Tumors Enrolled on Sarcoma Alliance for Research Through Collaboration (SARC) Phase II Trials. Oncologist 28 (5): 453-459, 2023. [PUBMED Abstract]
16. Martin E, Coert JH, Flucke UE, et al.: Neurofibromatosis-associated malignant peripheral nerve sheath tumors in children have a worse prognosis: A nationwide cohort study. Pediatr Blood Cancer 67 (4): e28138, 2020. [PUBMED Abstract]
17. Meister MT, Scheer M, Hallmen E, et al.: Malignant peripheral nerve sheath tumors in children, adolescents, and young adults: Treatment results of five Cooperative Weichteilsarkom Studiengruppe (CWS) trials and one registry. J Surg Oncol 122 (7): 1337-1347, 2020. [PUBMED Abstract]
18. Bahig H, Roberge D, Bosch W, et al.: Agreement among RTOG sarcoma radiation oncologists in contouring suspicious peritumoral edema for preoperative radiation therapy of soft tissue sarcoma of the extremity. Int J Radiat Oncol Biol Phys 86 (2): 298-303, 2013. [PUBMED Abstract]
19. Baldini EH, Wang D, Haas RL, et al.: Treatment Guidelines for Preoperative Radiation Therapy for Retroperitoneal Sarcoma: Preliminary Consensus of an International Expert Panel. Int J Radiat Oncol Biol Phys 92 (3): 602-12, 2015. [PUBMED Abstract]
20. Ferrari A, Bisogno G, Macaluso A, et al.: Soft-tissue sarcomas in children and adolescents with neurofibromatosis type 1. Cancer 109 (7): 1406-12, 2007. [PUBMED Abstract]
21. van Noesel MM, Orbach D, Brennan B, et al.: Outcome and prognostic factors in pediatric malignant peripheral nerve sheath tumors: An analysis of the European Pediatric Soft Tissue Sarcoma Group (EpSSG) NRSTS-2005 prospective study. Pediatr Blood Cancer 66 (10): e27833, 2019. [PUBMED Abstract]
22. Higham CS, Steinberg SM, Dombi E, et al.: SARC006: Phase II Trial of Chemotherapy in Sporadic and Neurofibromatosis Type 1 Associated Chemotherapy-Naive Malignant Peripheral Nerve Sheath Tumors. Sarcoma 2017: 8685638, 2017. [PUBMED Abstract]
23. Bergamaschi L, Bisogno G, Manzitti C, et al.: Salvage rates and prognostic factors after relapse in children and adolescents with malignant peripheral nerve sheath tumors. Pediatr Blood Cancer 65 (2): , 2018. [PUBMED Abstract]
24. Al-Ezzi E, Gounder M, Watson G, et al.: Selinexor, a First in Class, Nuclear Export Inhibitor for the Treatment of Advanced Malignant Peripheral Nerve Sheath Tumor. Oncologist 26 (4): e710-e714, 2021. [PUBMED Abstract]
25. WHO Classification of Tumours Editorial Board: WHO Classification of Tumours. Volume 3: Soft Tissue and Bone Tumours. 5th ed., IARC Press, 2020.
26. de Traux de Wardin H, Dermawan JK, Vanoli F, et al.: NF1-Driven Rhabdomyosarcoma Phenotypes: A Comparative Clinical and Molecular Study of NF1-Mutant Rhabdomyosarcoma and NF1-Associated Malignant Triton Tumor. JCO Precis Oncol 8: e2300597, 2024. [PUBMED Abstract]
27. Schaefer IM, Fletcher CD, Hornick JL: Loss of H3K27 trimethylation distinguishes malignant peripheral nerve sheath tumors from histologic mimics. Mod Pathol 29 (1): 4-13, 2016. [PUBMED Abstract]
28. Hornick JL, Nielsen GP: Beyond "Triton": Malignant Peripheral Nerve Sheath Tumors With Complete Heterologous Rhabdomyoblastic Differentiation Mimicking Spindle Cell Rhabdomyosarcoma. Am J Surg Pathol 43 (10): 1323-1330, 2019. [PUBMED Abstract]

Pericytic (perivascular) tumors have several subtypes, including the following:

References

1. Rodriguez-Galindo C, Ramsey K, Jenkins JJ, et al.: Hemangiopericytoma in children and infants. Cancer 88 (1): 198-204, 2000. [PUBMED Abstract]
2. Ferrari A, Casanova M, Bisogno G, et al.: Hemangiopericytoma in pediatric ages: a report from the Italian and German Soft Tissue Sarcoma Cooperative Group. Cancer 92 (10): 2692-8, 2001. [PUBMED Abstract]
3. Bien E, Stachowicz-Stencel T, Godzinski J, et al.: Retrospective multi-institutional study on hemangiopericytoma in Polish children. Pediatr Int 51 (1): 19-24, 2009. [PUBMED Abstract]
4. Weiss SW, Goldblum JR: Enzinger and Weiss's Soft Tissue Tumors. 5th ed. Mosby, 2008.
5. Fernandez-Pineda I, Parida L, Jenkins JJ, et al.: Childhood hemangiopericytoma: review of St Jude Children's Research Hospital. J Pediatr Hematol Oncol 33 (5): 356-9, 2011. [PUBMED Abstract]
6. Haller F, Knopf J, Ackermann A, et al.: Paediatric and adult soft tissue sarcomas with NTRK1 gene fusions: a subset of spindle cell sarcomas unified by a prominent myopericytic/haemangiopericytic pattern. J Pathol 238 (5): 700-10, 2016. [PUBMED Abstract]
7. Wong V, Pavlick D, Brennan T, et al.: Evaluation of a Congenital Infantile Fibrosarcoma by Comprehensive Genomic Profiling Reveals an LMNA-NTRK1 Gene Fusion Responsive to Crizotinib. J Natl Cancer Inst 108 (1): , 2016. [PUBMED Abstract]
8. Doebele RC, Davis LE, Vaishnavi A, et al.: An Oncogenic NTRK Fusion in a Patient with Soft-Tissue Sarcoma with Response to the Tropomyosin-Related Kinase Inhibitor LOXO-101. Cancer Discov 5 (10): 1049-57, 2015. [PUBMED Abstract]
9. Wiswell TE, Davis J, Cunningham BE, et al.: Infantile myofibromatosis: the most common fibrous tumor of infancy. J Pediatr Surg 23 (4): 315-8, 1988. [PUBMED Abstract]
10. Chung EB, Enzinger FM: Infantile myofibromatosis. Cancer 48 (8): 1807-18, 1981. [PUBMED Abstract]
11. Modi N: Congenital generalised fibromatosis. Arch Dis Child 57 (11): 881-2, 1982. [PUBMED Abstract]
12. Levine E, Fréneaux P, Schleiermacher G, et al.: Risk-adapted therapy for infantile myofibromatosis in children. Pediatr Blood Cancer 59 (1): 115-20, 2012. [PUBMED Abstract]
13. Larralde M, Hoffner MV, Boggio P, et al.: Infantile myofibromatosis: report of nine patients. Pediatr Dermatol 27 (1): 29-33, 2010 Jan-Feb. [PUBMED Abstract]
14. Agaimy A, Bieg M, Michal M, et al.: Recurrent Somatic PDGFRB Mutations in Sporadic Infantile/Solitary Adult Myofibromas But Not in Angioleiomyomas and Myopericytomas. Am J Surg Pathol 41 (2): 195-203, 2017. [PUBMED Abstract]
15. Arts FA, Sciot R, Brichard B, et al.: PDGFRB gain-of-function mutations in sporadic infantile myofibromatosis. Hum Mol Genet 26 (10): 1801-1810, 2017. [PUBMED Abstract]
16. Dachy G, de Krijger RR, Fraitag S, et al.: Association of PDGFRB Mutations With Pediatric Myofibroma and Myofibromatosis. JAMA Dermatol 155 (8): 946-950, 2019. [PUBMED Abstract]
17. Cheung YH, Gayden T, Campeau PM, et al.: A recurrent PDGFRB mutation causes familial infantile myofibromatosis. Am J Hum Genet 92 (6): 996-1000, 2013. [PUBMED Abstract]
18. Martignetti JA, Tian L, Li D, et al.: Mutations in PDGFRB cause autosomal-dominant infantile myofibromatosis. Am J Hum Genet 92 (6): 1001-7, 2013. [PUBMED Abstract]
19. Murray N, Hanna B, Graf N, et al.: The spectrum of infantile myofibromatosis includes both non-penetrance and adult recurrence. Eur J Med Genet 60 (7): 353-358, 2017. [PUBMED Abstract]
20. Hettmer S, Dachy G, Seitz G, et al.: Genetic testing and surveillance in infantile myofibromatosis: a report from the SIOPE Host Genome Working Group. Fam Cancer 20 (4): 327-336, 2021. [PUBMED Abstract]
21. Gopal M, Chahal G, Al-Rifai Z, et al.: Infantile myofibromatosis. Pediatr Surg Int 24 (3): 287-91, 2008. [PUBMED Abstract]
22. Sparber-Sauer M, Vokuhl C, Seitz G, et al.: Infantile myofibromatosis: Excellent prognosis but also rare fatal progressive disease. Treatment results of five Cooperative Weichteilsarkom Studiengruppe (CWS) trials and one registry. Pediatr Blood Cancer 69 (3): e29403, 2022. [PUBMED Abstract]
23. Weaver MS, Navid F, Huppmann A, et al.: Vincristine and Dactinomycin in Infantile Myofibromatosis With a Review of Treatment Options. J Pediatr Hematol Oncol 37 (3): 237-41, 2015. [PUBMED Abstract]
24. Weller JM, Keil VC, Gielen GH, et al.: PDGRFB mutation-associated myofibromatosis: Response to targeted therapy with imatinib. Am J Med Genet A 179 (9): 1895-1897, 2019. [PUBMED Abstract]
25. Wenger TL, Bly RA, Wu N, et al.: Activating variants in PDGFRB result in a spectrum of disorders responsive to imatinib monotherapy. Am J Med Genet A 182 (7): 1576-1591, 2020. [PUBMED Abstract]
26. Mudry P, Slaby O, Neradil J, et al.: Case report: rapid and durable response to PDGFR targeted therapy in a child with refractory multiple infantile myofibromatosis and a heterozygous germline mutation of the PDGFRB gene. BMC Cancer 17 (1): 119, 2017. [PUBMED Abstract]
27. Pond D, Arts FA, Mendelsohn NJ, et al.: A patient with germ-line gain-of-function PDGFRB p.N666H mutation and marked clinical response to imatinib. Genet Med 20 (1): 142-150, 2018. [PUBMED Abstract]

Tumors of uncertain differentiation have many subtypes, including the following:

References

1. Wilkes D, Charitakis K, Basson CT: Inherited disposition to cardiac myxoma development. Nat Rev Cancer 6 (2): 157-65, 2006. [PUBMED Abstract]
2. Carney JA, Young WF: Primary pigmented nodular adrenocortical disease and its associated conditions. Endocrinologist 2: 6-21, 1992.
3. Ryan MW, Cunningham S, Xiao SY: Maxillary sinus melanoma as the presenting feature of Carney complex. Int J Pediatr Otorhinolaryngol 72 (3): 405-8, 2008. [PUBMED Abstract]
4. Sultan I, Rodriguez-Galindo C, Saab R, et al.: Comparing children and adults with synovial sarcoma in the Surveillance, Epidemiology, and End Results program, 1983 to 2005: an analysis of 1268 patients. Cancer 115 (15): 3537-47, 2009. [PUBMED Abstract]
5. Spunt SL, Million L, Chi YY, et al.: A risk-based treatment strategy for non-rhabdomyosarcoma soft-tissue sarcomas in patients younger than 30 years (ARST0332): a Children's Oncology Group prospective study. Lancet Oncol 21 (1): 145-161, 2020. [PUBMED Abstract]
6. Wang JG, Li NN: Primary cardiac synovial sarcoma. Ann Thorac Surg 95 (6): 2202-9, 2013. [PUBMED Abstract]
7. Chirmade PC, Parikh S, Anand A, et al.: Primary pleuropulmonary synovial sarcoma with brain metastases in a paediatric patient: an unusual presentation. Adv Respir Med 85 (4): 206-210, 2017. [PUBMED Abstract]
8. Frazier AA, Franks TJ, Pugatch RD, et al.: From the archives of the AFIP: Pleuropulmonary synovial sarcoma. Radiographics 26 (3): 923-40, 2006 May-Jun. [PUBMED Abstract]
9. Essary LR, Vargas SO, Fletcher CD: Primary pleuropulmonary synovial sarcoma: reappraisal of a recently described anatomic subset. Cancer 94 (2): 459-69, 2002. [PUBMED Abstract]
10. Pappo AS, Fontanesi J, Luo X, et al.: Synovial sarcoma in children and adolescents: the St Jude Children's Research Hospital experience. J Clin Oncol 12 (11): 2360-6, 1994. [PUBMED Abstract]
11. Ferrari A, De Salvo GL, Oberlin O, et al.: Synovial sarcoma in children and adolescents: a critical reappraisal of staging investigations in relation to the rate of metastatic involvement at diagnosis. Eur J Cancer 48 (9): 1370-5, 2012. [PUBMED Abstract]
12. Scheer M, Blank B, Bauer S, et al.: Synovial sarcoma disease characteristics and primary tumor sites differ between patient age groups: a report of the Cooperative Weichteilsarkom Studiengruppe (CWS). J Cancer Res Clin Oncol 146 (4): 953-960, 2020. [PUBMED Abstract]
13. van de Rijn M, Barr FG, Collins MH, et al.: Absence of SYT-SSX fusion products in soft tissue tumors other than synovial sarcoma. Am J Clin Pathol 112 (1): 43-9, 1999. [PUBMED Abstract]
14. Krsková L, Sumerauer D, Stejskalová E, et al.: A novel variant of SYT-SSX1 fusion gene in a case of spindle cell synovial sarcoma. Diagn Mol Pathol 16 (3): 179-83, 2007. [PUBMED Abstract]
15. Su L, Sampaio AV, Jones KB, et al.: Deconstruction of the SS18-SSX fusion oncoprotein complex: insights into disease etiology and therapeutics. Cancer Cell 21 (3): 333-47, 2012. [PUBMED Abstract]
16. Arnold MA, Arnold CA, Li G, et al.: A unique pattern of INI1 immunohistochemistry distinguishes synovial sarcoma from its histologic mimics. Hum Pathol 44 (5): 881-7, 2013. [PUBMED Abstract]
17. Vlenterie M, Ho VK, Kaal SE, et al.: Age as an independent prognostic factor for survival of localised synovial sarcoma patients. Br J Cancer 113 (11): 1602-6, 2015. [PUBMED Abstract]
18. Smolle MA, Parry M, Jeys L, et al.: Synovial sarcoma: Do children do better? Eur J Surg Oncol 45 (2): 254-260, 2019. [PUBMED Abstract]
19. Okcu MF, Munsell M, Treuner J, et al.: Synovial sarcoma of childhood and adolescence: a multicenter, multivariate analysis of outcome. J Clin Oncol 21 (8): 1602-11, 2003. [PUBMED Abstract]
20. Brecht IB, Ferrari A, Int-Veen C, et al.: Grossly-resected synovial sarcoma treated by the German and Italian Pediatric Soft Tissue Sarcoma Cooperative Groups: discussion on the role of adjuvant therapies. Pediatr Blood Cancer 46 (1): 11-7, 2006. [PUBMED Abstract]
21. Stanelle EJ, Christison-Lagay ER, Healey JH, et al.: Pediatric and adolescent synovial sarcoma: multivariate analysis of prognostic factors and survival outcomes. Ann Surg Oncol 20 (1): 73-9, 2013. [PUBMED Abstract]
22. Lagarde P, Przybyl J, Brulard C, et al.: Chromosome instability accounts for reverse metastatic outcomes of pediatric and adult synovial sarcomas. J Clin Oncol 31 (5): 608-15, 2013. [PUBMED Abstract]
23. Stegmaier S, Leuschner I, Poremba C, et al.: The prognostic impact of SYT-SSX fusion type and histological grade in pediatric patients with synovial sarcoma treated according to the CWS (Cooperative Weichteilsarkom Studie) trials. Pediatr Blood Cancer 64 (1): 89-95, 2017. [PUBMED Abstract]
24. Scheer M, Dantonello T, Hallmen E, et al.: Primary Metastatic Synovial Sarcoma: Experience of the CWS Study Group. Pediatr Blood Cancer 63 (7): 1198-206, 2016. [PUBMED Abstract]
25. Orbach D, Mosseri V, Pissaloux D, et al.: Genomic complexity in pediatric synovial sarcomas (Synobio study): the European pediatric soft tissue sarcoma group (EpSSG) experience. Cancer Med 7 (4): 1384-1393, 2018. [PUBMED Abstract]
26. Trassard M, Le Doussal V, Hacène K, et al.: Prognostic factors in localized primary synovial sarcoma: a multicenter study of 128 adult patients. J Clin Oncol 19 (2): 525-34, 2001. [PUBMED Abstract]
27. Guillou L, Benhattar J, Bonichon F, et al.: Histologic grade, but not SYT-SSX fusion type, is an important prognostic factor in patients with synovial sarcoma: a multicenter, retrospective analysis. J Clin Oncol 22 (20): 4040-50, 2004. [PUBMED Abstract]
28. Ferrari A, Gronchi A, Casanova M, et al.: Synovial sarcoma: a retrospective analysis of 271 patients of all ages treated at a single institution. Cancer 101 (3): 627-34, 2004. [PUBMED Abstract]
29. Bahig H, Roberge D, Bosch W, et al.: Agreement among RTOG sarcoma radiation oncologists in contouring suspicious peritumoral edema for preoperative radiation therapy of soft tissue sarcoma of the extremity. Int J Radiat Oncol Biol Phys 86 (2): 298-303, 2013. [PUBMED Abstract]
30. Baldini EH, Wang D, Haas RL, et al.: Treatment Guidelines for Preoperative Radiation Therapy for Retroperitoneal Sarcoma: Preliminary Consensus of an International Expert Panel. Int J Radiat Oncol Biol Phys 92 (3): 602-12, 2015. [PUBMED Abstract]
31. Ferrari A, Chi YY, De Salvo GL, et al.: Surgery alone is sufficient therapy for children and adolescents with low-risk synovial sarcoma: A joint analysis from the European paediatric soft tissue sarcoma Study Group and the Children's Oncology Group. Eur J Cancer 78: 1-6, 2017. [PUBMED Abstract]
32. McGrory JE, Pritchard DJ, Arndt CA, et al.: Nonrhabdomyosarcoma soft tissue sarcomas in children. The Mayo Clinic experience. Clin Orthop (374): 247-58, 2000. [PUBMED Abstract]
33. Van Glabbeke M, van Oosterom AT, Oosterhuis JW, et al.: Prognostic factors for the outcome of chemotherapy in advanced soft tissue sarcoma: an analysis of 2,185 patients treated with anthracycline-containing first-line regimens--a European Organization for Research and Treatment of Cancer Soft Tissue and Bone Sarcoma Group Study. J Clin Oncol 17 (1): 150-7, 1999. [PUBMED Abstract]
34. Koscielniak E, Harms D, Henze G, et al.: Results of treatment for soft tissue sarcoma in childhood and adolescence: a final report of the German Cooperative Soft Tissue Sarcoma Study CWS-86. J Clin Oncol 17 (12): 3706-19, 1999. [PUBMED Abstract]
35. Pappo AS, Devidas M, Jenkins J, et al.: Phase II trial of neoadjuvant vincristine, ifosfamide, and doxorubicin with granulocyte colony-stimulating factor support in children and adolescents with advanced-stage nonrhabdomyosarcomatous soft tissue sarcomas: a Pediatric Oncology Group Study. J Clin Oncol 23 (18): 4031-8, 2005. [PUBMED Abstract]
36. Cecchetto G, Alaggio R, Dall'Igna P, et al.: Localized unresectable non-rhabdo soft tissue sarcomas of the extremities in pediatric age: results from the Italian studies. Cancer 104 (9): 2006-12, 2005. [PUBMED Abstract]
37. Pappo AS, Rao BN, Jenkins JJ, et al.: Metastatic nonrhabdomyosarcomatous soft-tissue sarcomas in children and adolescents: the St. Jude Children's Research Hospital experience. Med Pediatr Oncol 33 (2): 76-82, 1999. [PUBMED Abstract]
38. Brennan B, Stevens M, Kelsey A, et al.: Synovial sarcoma in childhood and adolescence: a retrospective series of 77 patients registered by the Children's Cancer and Leukaemia Group between 1991 and 2006. Pediatr Blood Cancer 55 (1): 85-90, 2010. [PUBMED Abstract]
39. Ferrari A, Miceli R, Rey A, et al.: Non-metastatic unresected paediatric non-rhabdomyosarcoma soft tissue sarcomas: results of a pooled analysis from United States and European groups. Eur J Cancer 47 (5): 724-31, 2011. [PUBMED Abstract]
40. Raney RB: Synovial sarcoma in young people: background, prognostic factors, and therapeutic questions. J Pediatr Hematol Oncol 27 (4): 207-11, 2005. [PUBMED Abstract]
41. Orbach D, Mc Dowell H, Rey A, et al.: Sparing strategy does not compromise prognosis in pediatric localized synovial sarcoma: experience of the International Society of Pediatric Oncology, Malignant Mesenchymal Tumors (SIOP-MMT) Working Group. Pediatr Blood Cancer 57 (7): 1130-6, 2011. [PUBMED Abstract]
42. Ladenstein R, Treuner J, Koscielniak E, et al.: Synovial sarcoma of childhood and adolescence. Report of the German CWS-81 study. Cancer 71 (11): 3647-55, 1993. [PUBMED Abstract]
43. Venkatramani R, Xue W, Randall RL, et al.: Synovial Sarcoma in Children, Adolescents, and Young Adults: A Report From the Children's Oncology Group ARST0332 Study. J Clin Oncol 39 (35): 3927-3937, 2021. [PUBMED Abstract]
44. Ferrari A, De Salvo GL, Brennan B, et al.: Synovial sarcoma in children and adolescents: the European Pediatric Soft Tissue Sarcoma Study Group prospective trial (EpSSG NRSTS 2005). Ann Oncol 26 (3): 567-72, 2015. [PUBMED Abstract]
45. Scheer M, Hallmen E, Vokuhl C, et al.: Pre-operative radiotherapy is associated with superior local relapse-free survival in advanced synovial sarcoma. J Cancer Res Clin Oncol 149 (5): 1717-1731, 2023. [PUBMED Abstract]
46. Ferrari A, De Salvo GL, Dall'Igna P, et al.: Salvage rates and prognostic factors after relapse in children and adolescents with initially localised synovial sarcoma. Eur J Cancer 48 (18): 3448-55, 2012. [PUBMED Abstract]
47. Scheer M, Dantonello T, Hallmen E, et al.: Synovial Sarcoma Recurrence in Children and Young Adults. Ann Surg Oncol 23 (Suppl 5): 618-626, 2016. [PUBMED Abstract]
48. Ferrari A, Orbach D, Bergamaschi L, et al.: Treatment at relapse for synovial sarcoma of children and adolescents: A multi-institutional European retrospective analysis. Pediatr Blood Cancer 71 (7): e31038, 2024. [PUBMED Abstract]
49. Dhakal S, Corbin KS, Milano MT, et al.: Stereotactic body radiotherapy for pulmonary metastases from soft-tissue sarcomas: excellent local lesion control and improved patient survival. Int J Radiat Oncol Biol Phys 82 (2): 940-5, 2012. [PUBMED Abstract]
50. Lai JP, Robbins PF, Raffeld M, et al.: NY-ESO-1 expression in synovial sarcoma and other mesenchymal tumors: significance for NY-ESO-1-based targeted therapy and differential diagnosis. Mod Pathol 25 (6): 854-8, 2012. [PUBMED Abstract]
51. Robbins PF, Kassim SH, Tran TL, et al.: A pilot trial using lymphocytes genetically engineered with an NY-ESO-1-reactive T-cell receptor: long-term follow-up and correlates with response. Clin Cancer Res 21 (5): 1019-27, 2015. [PUBMED Abstract]
52. D'Angelo SP, Melchiori L, Merchant MS, et al.: Antitumor Activity Associated with Prolonged Persistence of Adoptively Transferred NY-ESO-1 c259T Cells in Synovial Sarcoma. Cancer Discov 8 (8): 944-957, 2018. [PUBMED Abstract]
53. Chbani L, Guillou L, Terrier P, et al.: Epithelioid sarcoma: a clinicopathologic and immunohistochemical analysis of 106 cases from the French sarcoma group. Am J Clin Pathol 131 (2): 222-7, 2009. [PUBMED Abstract]
54. Hornick JL, Dal Cin P, Fletcher CD: Loss of INI1 expression is characteristic of both conventional and proximal-type epithelioid sarcoma. Am J Surg Pathol 33 (4): 542-50, 2009. [PUBMED Abstract]
55. Knutson SK, Warholic NM, Wigle TJ, et al.: Durable tumor regression in genetically altered malignant rhabdoid tumors by inhibition of methyltransferase EZH2. Proc Natl Acad Sci U S A 110 (19): 7922-7, 2013. [PUBMED Abstract]
56. Guzzetta AA, Montgomery EA, Lyu H, et al.: Epithelioid sarcoma: one institution's experience with a rare sarcoma. J Surg Res 177 (1): 116-22, 2012. [PUBMED Abstract]
57. Hawkins DS, Spunt SL, Skapek SX, et al.: Children's Oncology Group's 2013 blueprint for research: Soft tissue sarcomas. Pediatr Blood Cancer 60 (6): 1001-8, 2013. [PUBMED Abstract]
58. Sparber-Sauer M, Koscielniak E, Vokuhl C, et al.: Epithelioid sarcoma in children, adolescents, and young adults: Localized, primary metastatic and relapsed disease. Treatment results of five Cooperative Weichteilsarkom Studiengruppe (CWS) trials and one registry. Pediatr Blood Cancer 66 (9): e27879, 2019. [PUBMED Abstract]
59. Spunt SL, Francotte N, De Salvo GL, et al.: Clinical features and outcomes of young patients with epithelioid sarcoma: an analysis from the Children's Oncology Group and the European paediatric soft tissue Sarcoma Study Group prospective clinical trials. Eur J Cancer 112: 98-106, 2019. [PUBMED Abstract]
60. Casanova M, Ferrari A, Collini P, et al.: Epithelioid sarcoma in children and adolescents: a report from the Italian Soft Tissue Sarcoma Committee. Cancer 106 (3): 708-17, 2006. [PUBMED Abstract]
61. Gounder M, Schöffski P, Jones RL, et al.: Tazemetostat in advanced epithelioid sarcoma with loss of INI1/SMARCB1: an international, open-label, phase 2 basket study. Lancet Oncol 21 (11): 1423-1432, 2020. [PUBMED Abstract]
62. Orbach D, Brennan B, Casanova M, et al.: Paediatric and adolescent alveolar soft part sarcoma: A joint series from European cooperative groups. Pediatr Blood Cancer 60 (11): 1826-32, 2013. [PUBMED Abstract]
63. Ferrari A, Sultan I, Huang TT, et al.: Soft tissue sarcoma across the age spectrum: a population-based study from the Surveillance Epidemiology and End Results database. Pediatr Blood Cancer 57 (6): 943-9, 2011. [PUBMED Abstract]
64. Wang HW, Qin XJ, Yang WJ, et al.: Alveolar soft part sarcoma of the oral and maxillofacial region: clinical analysis in a series of 18 patients. Oral Surg Oral Med Oral Pathol Oral Radiol 119 (4): 396-401, 2015. [PUBMED Abstract]
65. Kayton ML, Meyers P, Wexler LH, et al.: Clinical presentation, treatment, and outcome of alveolar soft part sarcoma in children, adolescents, and young adults. J Pediatr Surg 41 (1): 187-93, 2006. [PUBMED Abstract]
66. Sparber-Sauer M, Seitz G, von Kalle T, et al.: Alveolar soft-part sarcoma: Primary metastatic disease and metastatic relapse occurring during long-term follow-up: Treatment results of four Cooperative Weichteilsarkom Studiengruppe (CWS) trials and one registry. Pediatr Blood Cancer 65 (12): e27405, 2018. [PUBMED Abstract]
67. Flores RJ, Harrison DJ, Federman NC, et al.: Alveolar soft part sarcoma in children and young adults: A report of 69 cases. Pediatr Blood Cancer 65 (5): e26953, 2018. [PUBMED Abstract]
68. Ladanyi M, Lui MY, Antonescu CR, et al.: The der(17)t(X;17)(p11;q25) of human alveolar soft part sarcoma fuses the TFE3 transcription factor gene to ASPL, a novel gene at 17q25. Oncogene 20 (1): 48-57, 2001. [PUBMED Abstract]
69. Williams A, Bartle G, Sumathi VP, et al.: Detection of ASPL/TFE3 fusion transcripts and the TFE3 antigen in formalin-fixed, paraffin-embedded tissue in a series of 18 cases of alveolar soft part sarcoma: useful diagnostic tools in cases with unusual histological features. Virchows Arch 458 (3): 291-300, 2011. [PUBMED Abstract]
70. Lieberman PH, Brennan MF, Kimmel M, et al.: Alveolar soft-part sarcoma. A clinico-pathologic study of half a century. Cancer 63 (1): 1-13, 1989. [PUBMED Abstract]
71. Casanova M, Ferrari A, Bisogno G, et al.: Alveolar soft part sarcoma in children and adolescents: A report from the Soft-Tissue Sarcoma Italian Cooperative Group. Ann Oncol 11 (11): 1445-9, 2000. [PUBMED Abstract]
72. Pennacchioli E, Fiore M, Collini P, et al.: Alveolar soft part sarcoma: clinical presentation, treatment, and outcome in a series of 33 patients at a single institution. Ann Surg Oncol 17 (12): 3229-33, 2010. [PUBMED Abstract]
73. Wilky BA, Trucco MM, Subhawong TK, et al.: Axitinib plus pembrolizumab in patients with advanced sarcomas including alveolar soft-part sarcoma: a single-centre, single-arm, phase 2 trial. Lancet Oncol 20 (6): 837-848, 2019. [PUBMED Abstract]
74. Stacchiotti S, Negri T, Zaffaroni N, et al.: Sunitinib in advanced alveolar soft part sarcoma: evidence of a direct antitumor effect. Ann Oncol 22 (7): 1682-90, 2011. [PUBMED Abstract]
75. Jagodzińska-Mucha P, Świtaj T, Kozak K, et al.: Long-term results of therapy with sunitinib in metastatic alveolar soft part sarcoma. Tumori 103 (3): 231-235, 2017. [PUBMED Abstract]
76. Cohen JW, Widemann BC, Derdak J, et al.: Cediranib phase-II study in children with metastatic alveolar soft-part sarcoma (ASPS). Pediatr Blood Cancer 66 (12): e27987, 2019. [PUBMED Abstract]
77. Judson I, Morden JP, Kilburn L, et al.: Cediranib in patients with alveolar soft-part sarcoma (CASPS): a double-blind, placebo-controlled, randomised, phase 2 trial. Lancet Oncol 20 (7): 1023-1034, 2019. [PUBMED Abstract]
78. Kummar S, Allen D, Monks A, et al.: Cediranib for metastatic alveolar soft part sarcoma. J Clin Oncol 31 (18): 2296-302, 2013. [PUBMED Abstract]
79. Kim M, Kim TM, Keam B, et al.: A Phase II Trial of Pazopanib in Patients with Metastatic Alveolar Soft Part Sarcoma. Oncologist 24 (1): 20-e29, 2019. [PUBMED Abstract]
80. Stacchiotti S, Mir O, Le Cesne A, et al.: Activity of Pazopanib and Trabectedin in Advanced Alveolar Soft Part Sarcoma. Oncologist 23 (1): 62-70, 2018. [PUBMED Abstract]
81. Roozendaal KJ, de Valk B, ten Velden JJ, et al.: Alveolar soft-part sarcoma responding to interferon alpha-2b. Br J Cancer 89 (2): 243-5, 2003. [PUBMED Abstract]
82. Conde N, Cruz O, Albert A, et al.: Antiangiogenic treatment as a pre-operative management of alveolar soft-part sarcoma. Pediatr Blood Cancer 57 (6): 1071-3, 2011. [PUBMED Abstract]
83. Meis-Kindblom JM: Clear cell sarcoma of tendons and aponeuroses: a historical perspective and tribute to the man behind the entity. Adv Anat Pathol 13 (6): 286-92, 2006. [PUBMED Abstract]
84. Dim DC, Cooley LD, Miranda RN: Clear cell sarcoma of tendons and aponeuroses: a review. Arch Pathol Lab Med 131 (1): 152-6, 2007. [PUBMED Abstract]
85. Blazer DG, Lazar AJ, Xing Y, et al.: Clinical outcomes of molecularly confirmed clear cell sarcoma from a single institution and in comparison with data from the Surveillance, Epidemiology, and End Results registry. Cancer 115 (13): 2971-9, 2009. [PUBMED Abstract]
86. Coindre JM, Hostein I, Terrier P, et al.: Diagnosis of clear cell sarcoma by real-time reverse transcriptase-polymerase chain reaction analysis of paraffin embedded tissues: clinicopathologic and molecular analysis of 44 patients from the French sarcoma group. Cancer 107 (5): 1055-64, 2006. [PUBMED Abstract]
87. Fujimura Y, Siddique H, Lee L, et al.: EWS-ATF-1 chimeric protein in soft tissue clear cell sarcoma associates with CREB-binding protein and interferes with p53-mediated trans-activation function. Oncogene 20 (46): 6653-9, 2001. [PUBMED Abstract]
88. Hisaoka M, Ishida T, Kuo TT, et al.: Clear cell sarcoma of soft tissue: a clinicopathologic, immunohistochemical, and molecular analysis of 33 cases. Am J Surg Pathol 32 (3): 452-60, 2008. [PUBMED Abstract]
89. Ferrari A, Casanova M, Bisogno G, et al.: Clear cell sarcoma of tendons and aponeuroses in pediatric patients: a report from the Italian and German Soft Tissue Sarcoma Cooperative Group. Cancer 94 (12): 3269-76, 2002. [PUBMED Abstract]
90. Karita M, Tsuchiya H, Yamamoto N, et al.: Caffeine-potentiated chemotherapy for clear cell sarcoma: a report of five cases. Int J Clin Oncol 18 (1): 33-7, 2013. [PUBMED Abstract]
91. Schöffski P, Wozniak A, Stacchiotti S, et al.: Activity and safety of crizotinib in patients with advanced clear-cell sarcoma with MET alterations: European Organization for Research and Treatment of Cancer phase II trial 90101 'CREATE'. Ann Oncol 28 (12): 3000-3008, 2017. [PUBMED Abstract]
92. Tsuneyoshi M, Enjoji M, Iwasaki H, et al.: Extraskeletal myxoid chondrosarcoma--a clinicopathologic and electron microscopic study. Acta Pathol Jpn 31 (3): 439-47, 1981. [PUBMED Abstract]
93. Hachitanda Y, Tsuneyoshi M, Daimaru Y, et al.: Extraskeletal myxoid chondrosarcoma in young children. Cancer 61 (12): 2521-6, 1988. [PUBMED Abstract]
94. Enzinger FM, Shiraki M: Extraskeletal myxoid chondrosarcoma. An analysis of 34 cases. Hum Pathol 3 (3): 421-35, 1972. [PUBMED Abstract]
95. McGrory JE, Rock MG, Nascimento AG, et al.: Extraskeletal myxoid chondrosarcoma. Clin Orthop Relat Res (382): 185-90, 2001. [PUBMED Abstract]
96. Drilon AD, Popat S, Bhuchar G, et al.: Extraskeletal myxoid chondrosarcoma: a retrospective review from 2 referral centers emphasizing long-term outcomes with surgery and chemotherapy. Cancer 113 (12): 3364-71, 2008. [PUBMED Abstract]
97. Hisaoka M, Ishida T, Imamura T, et al.: TFG is a novel fusion partner of NOR1 in extraskeletal myxoid chondrosarcoma. Genes Chromosomes Cancer 40 (4): 325-8, 2004. [PUBMED Abstract]
98. Stacchiotti S, Pantaleo MA, Astolfi A, et al.: Activity of sunitinib in extraskeletal myxoid chondrosarcoma. Eur J Cancer 50 (9): 1657-64, 2014. [PUBMED Abstract]
99. Leavey PJ, Laack NN, Krailo MD, et al.: Phase III Trial Adding Vincristine-Topotecan-Cyclophosphamide to the Initial Treatment of Patients With Nonmetastatic Ewing Sarcoma: A Children's Oncology Group Report. J Clin Oncol 39 (36): 4029-4038, 2021. [PUBMED Abstract]
100. Leuschner I, Radig K, Harms D: Desmoplastic small round cell tumor. Semin Diagn Pathol 13 (3): 204-12, 1996. [PUBMED Abstract]
101. Kushner BH, LaQuaglia MP, Wollner N, et al.: Desmoplastic small round-cell tumor: prolonged progression-free survival with aggressive multimodality therapy. J Clin Oncol 14 (5): 1526-31, 1996. [PUBMED Abstract]
102. Saab R, Khoury JD, Krasin M, et al.: Desmoplastic small round cell tumor in childhood: the St. Jude Children's Research Hospital experience. Pediatr Blood Cancer 49 (3): 274-9, 2007. [PUBMED Abstract]
103. Wang LL, Perlman EJ, Vujanic GM, et al.: Desmoplastic small round cell tumor of the kidney in childhood. Am J Surg Pathol 31 (4): 576-84, 2007. [PUBMED Abstract]
104. Hayes-Jordan A, LaQuaglia MP, Modak S: Management of desmoplastic small round cell tumor. Semin Pediatr Surg 25 (5): 299-304, 2016. [PUBMED Abstract]
105. Arora VC, Price AP, Fleming S, et al.: Characteristic imaging features of desmoplastic small round cell tumour. Pediatr Radiol 43 (1): 93-102, 2013. [PUBMED Abstract]
106. Gerald WL, Ladanyi M, de Alava E, et al.: Clinical, pathologic, and molecular spectrum of tumors associated with t(11;22)(p13;q12): desmoplastic small round-cell tumor and its variants. J Clin Oncol 16 (9): 3028-36, 1998. [PUBMED Abstract]
107. Slotkin EK, Bowman AS, Levine MF, et al.: Comprehensive Molecular Profiling of Desmoplastic Small Round Cell Tumor. Mol Cancer Res 19 (7): 1146-1155, 2021. [PUBMED Abstract]
108. Chow WA, Yee JK, Tsark W, et al.: Recurrent secondary genomic alterations in desmoplastic small round cell tumors. BMC Med Genet 21 (1): 101, 2020. [PUBMED Abstract]
109. Lal DR, Su WT, Wolden SL, et al.: Results of multimodal treatment for desmoplastic small round cell tumors. J Pediatr Surg 40 (1): 251-5, 2005. [PUBMED Abstract]
110. Philippe-Chomette P, Kabbara N, Andre N, et al.: Desmoplastic small round cell tumors with EWS-WT1 fusion transcript in children and young adults. Pediatr Blood Cancer 58 (6): 891-7, 2012. [PUBMED Abstract]
111. Sedig L, Geiger J, Mody R, et al.: Paratesticular desmoplastic small round cell tumors: A case report and review of the literature. Pediatr Blood Cancer 64 (12): , 2017. [PUBMED Abstract]
112. Subbiah V, Lamhamedi-Cherradi SE, Cuglievan B, et al.: Multimodality Treatment of Desmoplastic Small Round Cell Tumor: Chemotherapy and Complete Cytoreductive Surgery Improve Patient Survival. Clin Cancer Res 24 (19): 4865-4873, 2018. [PUBMED Abstract]
113. Schwarz RE, Gerald WL, Kushner BH, et al.: Desmoplastic small round cell tumors: prognostic indicators and results of surgical management. Ann Surg Oncol 5 (5): 416-22, 1998 Jul-Aug. [PUBMED Abstract]
114. Goodman KA, Wolden SL, La Quaglia MP, et al.: Whole abdominopelvic radiotherapy for desmoplastic small round-cell tumor. Int J Radiat Oncol Biol Phys 54 (1): 170-6, 2002. [PUBMED Abstract]
115. Osborne EM, Briere TM, Hayes-Jordan A, et al.: Survival and toxicity following sequential multimodality treatment including whole abdominopelvic radiotherapy for patients with desmoplastic small round cell tumor. Radiother Oncol 119 (1): 40-4, 2016. [PUBMED Abstract]
116. Atallah V, Honore C, Orbach D, et al.: Role of Adjuvant Radiation Therapy After Surgery for Abdominal Desmoplastic Small Round Cell Tumors. Int J Radiat Oncol Biol Phys 95 (4): 1244-53, 2016. [PUBMED Abstract]
117. Hayes-Jordan AA, Coakley BA, Green HL, et al.: Desmoplastic Small Round Cell Tumor Treated with Cytoreductive Surgery and Hyperthermic Intraperitoneal Chemotherapy: Results of a Phase 2 Trial. Ann Surg Oncol 25 (4): 872-877, 2018. [PUBMED Abstract]
118. Scalabre A, Philippe-Chomette P, Passot G, et al.: Cytoreductive surgery and hyperthermic intraperitoneal perfusion with chemotherapy in children with peritoneal tumor spread: A French nationwide study over 14 years. Pediatr Blood Cancer 65 (4): , 2018. [PUBMED Abstract]
119. Honoré C, Atallah V, Mir O, et al.: Abdominal desmoplastic small round cell tumor without extraperitoneal metastases: Is there a benefit for HIPEC after macroscopically complete cytoreductive surgery? PLoS One 12 (2): e0171639, 2017. [PUBMED Abstract]
120. Stiles ZE, Murphy AJ, Anghelescu DL, et al.: Desmoplastic Small Round Cell Tumor: Long-Term Complications After Cytoreduction and Hyperthermic Intraperitoneal Chemotherapy. Ann Surg Oncol 27 (1): 171-178, 2020. [PUBMED Abstract]
121. Cook RJ, Wang Z, Arora M, et al.: Clinical outcomes of patients with desmoplastic small round cell tumor of the peritoneum undergoing autologous HCT: a CIBMTR retrospective analysis. Bone Marrow Transplant 47 (11): 1455-8, 2012. [PUBMED Abstract]
122. Tarek N, Hayes-Jordan A, Salvador L, et al.: Recurrent desmoplastic small round cell tumor responding to an mTOR inhibitor containing regimen. Pediatr Blood Cancer 65 (1): , 2018. [PUBMED Abstract]
123. Kodet R, Newton WA, Sachs N, et al.: Rhabdoid tumors of soft tissues: a clinicopathologic study of 26 cases enrolled on the Intergroup Rhabdomyosarcoma Study. Hum Pathol 22 (7): 674-84, 1991. [PUBMED Abstract]
124. Biegel JA, Zhou JY, Rorke LB, et al.: Germ-line and acquired mutations of INI1 in atypical teratoid and rhabdoid tumors. Cancer Res 59 (1): 74-9, 1999. [PUBMED Abstract]
125. Eaton KW, Tooke LS, Wainwright LM, et al.: Spectrum of SMARCB1/INI1 mutations in familial and sporadic rhabdoid tumors. Pediatr Blood Cancer 56 (1): 7-15, 2011. [PUBMED Abstract]
126. Lee RS, Stewart C, Carter SL, et al.: A remarkably simple genome underlies highly malignant pediatric rhabdoid cancers. J Clin Invest 122 (8): 2983-8, 2012. [PUBMED Abstract]
127. Teplick A, Kowalski M, Biegel JA, et al.: Educational paper: screening in cancer predisposition syndromes: guidelines for the general pediatrician. Eur J Pediatr 170 (3): 285-94, 2011. [PUBMED Abstract]
128. Mitchell SG, Pencheva B, Porter CC: Germline Genetics and Childhood Cancer: Emerging Cancer Predisposition Syndromes and Psychosocial Impacts. Curr Oncol Rep 21 (10): 85, 2019. [PUBMED Abstract]
129. Foulkes WD, Kamihara J, Evans DGR, et al.: Cancer Surveillance in Gorlin Syndrome and Rhabdoid Tumor Predisposition Syndrome. Clin Cancer Res 23 (12): e62-e67, 2017. [PUBMED Abstract]
130. Morgan KM, Siow VS, Strotmeyer S, et al.: Characteristics and Outcomes in Pediatric Non-Central Nervous System Malignant Rhabdoid Tumors: A Report from the National Cancer Database. Ann Surg Oncol 29 (1): 671-678, 2022. [PUBMED Abstract]
131. Sultan I, Qaddoumi I, Rodríguez-Galindo C, et al.: Age, stage, and radiotherapy, but not primary tumor site, affects the outcome of patients with malignant rhabdoid tumors. Pediatr Blood Cancer 54 (1): 35-40, 2010. [PUBMED Abstract]
132. Nemes K, Bens S, Kachanov D, et al.: Clinical and genetic risk factors define two risk groups of extracranial malignant rhabdoid tumours (eMRT/RTK). Eur J Cancer 142: 112-122, 2021. [PUBMED Abstract]
133. Puri DR, Meyers PA, Kraus DH, et al.: Radiotherapy in the multimodal treatment of extrarenal extracranial malignant rhabdoid tumors. Pediatr Blood Cancer 50 (1): 167-9, 2008. [PUBMED Abstract]
134. Madigan CE, Armenian SH, Malogolowkin MH, et al.: Extracranial malignant rhabdoid tumors in childhood: the Childrens Hospital Los Angeles experience. Cancer 110 (9): 2061-6, 2007. [PUBMED Abstract]
135. Bourdeaut F, Fréneaux P, Thuille B, et al.: Extra-renal non-cerebral rhabdoid tumours. Pediatr Blood Cancer 51 (3): 363-8, 2008. [PUBMED Abstract]
136. Wetmore C, Boyett J, Li S, et al.: Alisertib is active as single agent in recurrent atypical teratoid rhabdoid tumors in 4 children. Neuro Oncol 17 (6): 882-8, 2015. [PUBMED Abstract]
137. Folpe A, Inwards C, eds.: Bone and Soft Tissue Pathology: A Volume in the Foundations in Diagnostic Pathology. WB Saunders Co, 2010.
138. Martignoni G, Pea M, Reghellin D, et al.: Molecular pathology of lymphangioleiomyomatosis and other perivascular epithelioid cell tumors. Arch Pathol Lab Med 134 (1): 33-40, 2010. [PUBMED Abstract]
139. Bissler JJ, McCormack FX, Young LR, et al.: Sirolimus for angiomyolipoma in tuberous sclerosis complex or lymphangioleiomyomatosis. N Engl J Med 358 (2): 140-51, 2008. [PUBMED Abstract]
140. Davies DM, Johnson SR, Tattersfield AE, et al.: Sirolimus therapy in tuberous sclerosis or sporadic lymphangioleiomyomatosis. N Engl J Med 358 (2): 200-3, 2008. [PUBMED Abstract]
141. Agaram NP, Sung YS, Zhang L, et al.: Dichotomy of Genetic Abnormalities in PEComas With Therapeutic Implications. Am J Surg Pathol 39 (6): 813-25, 2015. [PUBMED Abstract]
142. Armah HB, Parwani AV: Perivascular epithelioid cell tumor. Arch Pathol Lab Med 133 (4): 648-54, 2009. [PUBMED Abstract]
143. Alaggio R, Cecchetto G, Martignoni G, et al.: Malignant perivascular epithelioid cell tumor in children: description of a case and review of the literature. J Pediatr Surg 47 (6): e31-40, 2012. [PUBMED Abstract]
144. Wagner AJ, Malinowska-Kolodziej I, Morgan JA, et al.: Clinical activity of mTOR inhibition with sirolimus in malignant perivascular epithelioid cell tumors: targeting the pathogenic activation of mTORC1 in tumors. J Clin Oncol 28 (5): 835-40, 2010. [PUBMED Abstract]
145. Wagner AJ, Ravi V, Riedel RF, et al.: nab-Sirolimus for Patients With Malignant Perivascular Epithelioid Cell Tumors. J Clin Oncol 39 (33): 3660-3670, 2021. [PUBMED Abstract]
146. Laetsch TW, Roy A, Xu L, et al.: Undifferentiated Sarcomas in Children Harbor Clinically Relevant Oncogenic Fusions and Gene Copy-Number Alterations: A Report from the Children's Oncology Group. Clin Cancer Res 24 (16): 3888-3897, 2018. [PUBMED Abstract]
147. Randall RL, Albritton KH, Ferney BJ, et al.: Malignant fibrous histiocytoma of soft tissue: an abandoned diagnosis. Am J Orthop 33 (12): 602-8, 2004. [PUBMED Abstract]
148. Fletcher CDM, Bridge JA, Hogendoorn P, et al., eds.: WHO Classification of Tumours of Soft Tissue and Bone. 4th ed. IARC Press, 2013.
149. Alaggio R, Collini P, Randall RL, et al.: Undifferentiated high-grade pleomorphic sarcomas in children: a clinicopathologic study of 10 cases and review of literature. Pediatr Dev Pathol 13 (3): 209-17, 2010 May-Jun. [PUBMED Abstract]
150. Daw NC, Billups CA, Pappo AS, et al.: Malignant fibrous histiocytoma and other fibrohistiocytic tumors in pediatric patients: the St. Jude Children's Research Hospital experience. Cancer 97 (11): 2839-47, 2003. [PUBMED Abstract]
151. Bjerkehagen B, Smeland S, Walberg L, et al.: Radiation-induced sarcoma: 25-year experience from the Norwegian Radium Hospital. Acta Oncol 47 (8): 1475-82, 2008. [PUBMED Abstract]
152. Le Guellec S, Chibon F, Ouali M, et al.: Are peripheral purely undifferentiated pleomorphic sarcomas with MDM2 amplification dedifferentiated liposarcomas? Am J Surg Pathol 38 (3): 293-304, 2014. [PUBMED Abstract]
153. Tawbi HA, Burgess M, Bolejack V, et al.: Pembrolizumab in advanced soft-tissue sarcoma and bone sarcoma (SARC028): a multicentre, two-cohort, single-arm, open-label, phase 2 trial. Lancet Oncol 18 (11): 1493-1501, 2017. [PUBMED Abstract]

Vascular tumors vary from hemangiomas, which are always considered benign, to angiosarcomas, which are highly malignant.[1] Malignant vascular tumors include the following subtypes:

References

1. Coffin CM, Dehner LP: Vascular tumors in children and adolescents: a clinicopathologic study of 228 tumors in 222 patients. Pathol Annu 28 Pt 1: 97-120, 1993. [PUBMED Abstract]
2. Mehrabi A, Kashfi A, Fonouni H, et al.: Primary malignant hepatic epithelioid hemangioendothelioma: a comprehensive review of the literature with emphasis on the surgical therapy. Cancer 107 (9): 2108-21, 2006. [PUBMED Abstract]
3. Haro A, Saitoh G, Tamiya S, et al.: Four-year natural clinical course of pulmonary epithelioid hemangioendothelioma without therapy. Thorac Cancer 6 (4): 544-7, 2015. [PUBMED Abstract]
4. Sardaro A, Bardoscia L, Petruzzelli MF, et al.: Epithelioid hemangioendothelioma: an overview and update on a rare vascular tumor. Oncol Rev 8 (2): 259, 2014. [PUBMED Abstract]
5. Dong K, Wang XX, Feng JL, et al.: Pathological characteristics of liver biopsies in eight patients with hepatic epithelioid hemangioendothelioma. Int J Clin Exp Pathol 8 (9): 11015-23, 2015. [PUBMED Abstract]
6. Adams DM, Hammill A: Other vascular tumors. Semin Pediatr Surg 23 (4): 173-7, 2014. [PUBMED Abstract]
7. Xiao Y, Wang C, Song Y, et al.: Primary epithelioid hemangioendothelioma of the kidney: the first case report in a child and literature review. Urology 82 (4): 925-7, 2013. [PUBMED Abstract]
8. Reich S, Ringe H, Uhlenberg B, et al.: Epithelioid hemangioendothelioma of the lung presenting with pneumonia and heart rhythm disturbances in a teenage girl. J Pediatr Hematol Oncol 32 (4): 274-6, 2010. [PUBMED Abstract]
9. Cournoyer E, Al-Ibraheemi A, Engel E, et al.: Clinical characterization and long-term outcomes in pediatric epithelioid hemangioendothelioma. Pediatr Blood Cancer 67 (2): e28045, 2020. [PUBMED Abstract]
10. Daller JA, Bueno J, Gutierrez J, et al.: Hepatic hemangioendothelioma: clinical experience and management strategy. J Pediatr Surg 34 (1): 98-105; discussion 105-6, 1999. [PUBMED Abstract]
11. Ackermann O, Fabre M, Franchi S, et al.: Widening spectrum of liver angiosarcoma in children. J Pediatr Gastroenterol Nutr 53 (6): 615-9, 2011. [PUBMED Abstract]
12. Raheja A, Suri A, Singh S, et al.: Multimodality management of a giant skull base hemangioendothelioma of the sphenopetroclival region. J Clin Neurosci 22 (9): 1495-8, 2015. [PUBMED Abstract]
13. Ahmad N, Adams DM, Wang J, et al.: Hepatic epithelioid hemangioendothelioma in a patient with hemochromatosis. J Natl Compr Canc Netw 12 (9): 1203-7, 2014. [PUBMED Abstract]
14. Otte JB, Zimmerman A: The role of liver transplantation for pediatric epithelioid hemangioendothelioma. Pediatr Transplant 14 (3): 295-7, 2010. [PUBMED Abstract]
15. Stacchiotti S, Provenzano S, Dagrada G, et al.: Sirolimus in Advanced Epithelioid Hemangioendothelioma: A Retrospective Case-Series Analysis from the Italian Rare Cancer Network Database. Ann Surg Oncol 23 (9): 2735-44, 2016. [PUBMED Abstract]
16. Semenisty V, Naroditsky I, Keidar Z, et al.: Pazopanib for metastatic pulmonary epithelioid hemangioendothelioma-a suitable treatment option: case report and review of anti-angiogenic treatment options. BMC Cancer 15: 402, 2015. [PUBMED Abstract]
17. Engel ER, Cournoyer E, Adams DM, et al.: A Retrospective Review of the Use of Sirolimus for Pediatric Patients With Epithelioid Hemangioendothelioma. J Pediatr Hematol Oncol 42 (8): e826-e829, 2020. [PUBMED Abstract]
18. Orbach D, Van Noesel MM, Brennan B, et al.: Epithelioid hemangioendothelioma in children: The European Pediatric Soft Tissue Sarcoma Study Group experience. Pediatr Blood Cancer 69 (10): e29882, 2022. [PUBMED Abstract]
19. Cioffi A, Reichert S, Antonescu CR, et al.: Angiosarcomas and other sarcomas of endothelial origin. Hematol Oncol Clin North Am 27 (5): 975-88, 2013. [PUBMED Abstract]
20. Jeng MR, Fuh B, Blatt J, et al.: Malignant transformation of infantile hemangioma to angiosarcoma: response to chemotherapy with bevacizumab. Pediatr Blood Cancer 61 (11): 2115-7, 2014. [PUBMED Abstract]
21. Dehner LP, Ishak KG: Vascular tumors of the liver in infants and children. A study of 30 cases and review of the literature. Arch Pathol 92 (2): 101-11, 1971. [PUBMED Abstract]
22. Ferrari A, Casanova M, Bisogno G, et al.: Malignant vascular tumors in children and adolescents: a report from the Italian and German Soft Tissue Sarcoma Cooperative Group. Med Pediatr Oncol 39 (2): 109-14, 2002. [PUBMED Abstract]
23. Deyrup AT, Miettinen M, North PE, et al.: Pediatric cutaneous angiosarcomas: a clinicopathologic study of 10 cases. Am J Surg Pathol 35 (1): 70-5, 2011. [PUBMED Abstract]
24. Grassia KL, Peterman CM, Iacobas I, et al.: Clinical case series of pediatric hepatic angiosarcoma. Pediatr Blood Cancer 64 (11): , 2017. [PUBMED Abstract]
25. Elliott P, Kleinschmidt I: Angiosarcoma of the liver in Great Britain in proximity to vinyl chloride sites. Occup Environ Med 54 (1): 14-8, 1997. [PUBMED Abstract]
26. Lezama-del Valle P, Gerald WL, Tsai J, et al.: Malignant vascular tumors in young patients. Cancer 83 (8): 1634-9, 1998. [PUBMED Abstract]
27. Fata F, O'Reilly E, Ilson D, et al.: Paclitaxel in the treatment of patients with angiosarcoma of the scalp or face. Cancer 86 (10): 2034-7, 1999. [PUBMED Abstract]
28. Lahat G, Dhuka AR, Hallevi H, et al.: Angiosarcoma: clinical and molecular insights. Ann Surg 251 (6): 1098-106, 2010. [PUBMED Abstract]
29. Orlando G, Adam R, Mirza D, et al.: Hepatic hemangiosarcoma: an absolute contraindication to liver transplantation--the European Liver Transplant Registry experience. Transplantation 95 (6): 872-7, 2013. [PUBMED Abstract]
30. Aldén J, Baecklund F, Psaros Einberg A, et al.: Is primary hepatic angiosarcoma in children an indication for liver transplantation?-A single-centre experience and review of the literature. Pediatr Transplant 25 (8): e14095, 2021. [PUBMED Abstract]
31. Roy A, Gabani P, Davis EJ, et al.: Concurrent paclitaxel and radiation therapy for the treatment of cutaneous angiosarcoma. Clin Transl Radiat Oncol 27: 114-120, 2021. [PUBMED Abstract]
32. Sanada T, Nakayama H, Irisawa R, et al.: Clinical outcome and dose volume evaluation in patients who undergo brachytherapy for angiosarcoma of the scalp and face. Mol Clin Oncol 6 (3): 334-340, 2017. [PUBMED Abstract]
33. Guadagnolo BA, Zagars GK, Araujo D, et al.: Outcomes after definitive treatment for cutaneous angiosarcoma of the face and scalp. Head Neck 33 (5): 661-7, 2011. [PUBMED Abstract]
34. Scott MT, Portnow LH, Morris CG, et al.: Radiation therapy for angiosarcoma: the 35-year University of Florida experience. Am J Clin Oncol 36 (2): 174-80, 2013. [PUBMED Abstract]
35. Dickson MA, D'Adamo DR, Keohan ML, et al.: Phase II Trial of Gemcitabine and Docetaxel with Bevacizumab in Soft Tissue Sarcoma. Sarcoma 2015: 532478, 2015. [PUBMED Abstract]
36. North PE, Waner M, Mizeracki A, et al.: A unique microvascular phenotype shared by juvenile hemangiomas and human placenta. Arch Dermatol 137 (5): 559-70, 2001. [PUBMED Abstract]
37. Boye E, Yu Y, Paranya G, et al.: Clonality and altered behavior of endothelial cells from hemangiomas. J Clin Invest 107 (6): 745-52, 2001. [PUBMED Abstract]
38. Ravi V, Patel S: Vascular sarcomas. Curr Oncol Rep 15 (4): 347-55, 2013. [PUBMED Abstract]
39. Koo J, Knight-Perry J, Galambos C, et al.: Pediatric Metastatic Cardiac Angiosarcoma Successfully Treated With Multimodal Therapy: Case Report and Review of Literature. J Pediatr Hematol Oncol 43 (2): e203-e206, 2021. [PUBMED Abstract]

Standard treatment options for metastatic childhood soft tissue sarcoma include the following:

For treatment options, see the individual tumor type sections of the summary.

The prognosis for children with metastatic soft tissue sarcomas is poor.[1-6] In a prospective randomized trial, chemotherapy with vincristine, dactinomycin, doxorubicin, and cyclophosphamide, with or without dacarbazine, led to tumor responses in one-third of patients with unresectable or metastatic disease. However, the estimated 4-year survival rate was poor. Less than one-third of children survived.[6-8]

Targeted (stereotactic body) radiation therapy is an option for sites of metastasis, particularly the lung.[9] Targeted radiation therapy is also an option for local control or sites of metastasis, including the lungs, bones, and brain,[10,11] particularly in patients for whom the morbidity of resection is a concern or whose life expectancy is limited.[9]

In a prospective trial of children with metastatic soft tissue sarcoma, patients were randomly assigned to receive multiagent chemotherapy with or without the addition of bevacizumab.[12] There was no difference in event-free survival or overall survival between the two study arms.

References

1. Demetri GD, Elias AD: Results of single-agent and combination chemotherapy for advanced soft tissue sarcomas. Implications for decision making in the clinic. Hematol Oncol Clin North Am 9 (4): 765-85, 1995. [PUBMED Abstract]
2. Elias A, Ryan L, Sulkes A, et al.: Response to mesna, doxorubicin, ifosfamide, and dacarbazine in 108 patients with metastatic or unresectable sarcoma and no prior chemotherapy. J Clin Oncol 7 (9): 1208-16, 1989. [PUBMED Abstract]
3. Edmonson JH, Ryan LM, Blum RH, et al.: Randomized comparison of doxorubicin alone versus ifosfamide plus doxorubicin or mitomycin, doxorubicin, and cisplatin against advanced soft tissue sarcomas. J Clin Oncol 11 (7): 1269-75, 1993. [PUBMED Abstract]
4. Rao BN: Nonrhabdomyosarcoma in children: prognostic factors influencing survival. Semin Surg Oncol 9 (6): 524-31, 1993 Nov-Dec. [PUBMED Abstract]
5. deCou JM, Rao BN, Parham DM, et al.: Malignant peripheral nerve sheath tumors: the St. Jude Children's Research Hospital experience. Ann Surg Oncol 2 (6): 524-9, 1995. [PUBMED Abstract]
6. Pappo AS, Rao BN, Jenkins JJ, et al.: Metastatic nonrhabdomyosarcomatous soft-tissue sarcomas in children and adolescents: the St. Jude Children's Research Hospital experience. Med Pediatr Oncol 33 (2): 76-82, 1999. [PUBMED Abstract]
7. Pratt CB, Pappo AS, Gieser P, et al.: Role of adjuvant chemotherapy in the treatment of surgically resected pediatric nonrhabdomyosarcomatous soft tissue sarcomas: A Pediatric Oncology Group Study. J Clin Oncol 17 (4): 1219, 1999. [PUBMED Abstract]
8. Pratt CB, Maurer HM, Gieser P, et al.: Treatment of unresectable or metastatic pediatric soft tissue sarcomas with surgery, irradiation, and chemotherapy: a Pediatric Oncology Group study. Med Pediatr Oncol 30 (4): 201-9, 1998. [PUBMED Abstract]
9. Dhakal S, Corbin KS, Milano MT, et al.: Stereotactic body radiotherapy for pulmonary metastases from soft-tissue sarcomas: excellent local lesion control and improved patient survival. Int J Radiat Oncol Biol Phys 82 (2): 940-5, 2012. [PUBMED Abstract]
10. Howard TP, Boyle PJ, Marcus KJ, et al.: Clinical outcomes for pediatric patients receiving radiotherapy for solid tumor central nervous system metastases. Pediatr Blood Cancer 68 (12): e29331, 2021. [PUBMED Abstract]
11. Cameron AL, Elze MC, Casanova M, et al.: The Impact of Radiation Therapy in Children and Adolescents With Metastatic Rhabdomyosarcoma. Int J Radiat Oncol Biol Phys 111 (4): 968-978, 2021. [PUBMED Abstract]
12. Ferrari A, Merks JHM, Chisholm JC, et al.: Outcomes of metastatic non-rhabdomyosarcoma soft tissue sarcomas (NRSTS) treated within the BERNIE study: a randomised, phase II study evaluating the addition of bevacizumab to chemotherapy. Eur J Cancer 130: 72-80, 2020. [PUBMED Abstract]
13. Stanelle EJ, Christison-Lagay ER, Wolden SL, et al.: Pulmonary metastasectomy in pediatric/adolescent patients with synovial sarcoma: an institutional review. J Pediatr Surg 48 (4): 757-63, 2013. [PUBMED Abstract]
14. Putnam JB, Roth JA: Surgical treatment for pulmonary metastases from sarcoma. Hematol Oncol Clin North Am 9 (4): 869-87, 1995. [PUBMED Abstract]

With the possible exception of infants with infantile fibrosarcoma, the prognosis for patients with progressive or recurrent disease is poor. No prospective trial has demonstrated that enhanced local control of pediatric soft tissue sarcomas will ultimately improve survival. Therefore, treatment should be individualized for the site of recurrence, biological characteristics of the tumor (e.g., grade, invasiveness, and size), previous therapies, and individual patient considerations. All patients with recurrent tumors should consider participating in clinical trials.

Published results of two studies addressed the outcomes of children with relapsed synovial sarcoma. Most patients in one study had distant relapse (29 of 44 patients),[1] while most patients in the second study had local relapse (27 of 37 patients).[2] Distant recurrence was a poor prognostic variable, while tumor resectability at relapse (as manifested by extremity recurrence) was associated with a better outcome in both studies.

Resection is the standard treatment for recurrent pediatric nonrhabdomyosarcomatous soft tissue sarcomas. If the patient has not yet received radiation therapy, postoperative radiation should be considered after local excision of the recurrent tumor. Limb-sparing procedures with postoperative brachytherapy have been evaluated in adults but have not been studied extensively in children. For some children with extremity sarcomas who have received previous radiation therapy, amputation may be the only therapeutic option.

Treatment options for progressive or recurrent disease include the following:

References

1. Ferrari A, De Salvo GL, Dall'Igna P, et al.: Salvage rates and prognostic factors after relapse in children and adolescents with initially localised synovial sarcoma. Eur J Cancer 48 (18): 3448-55, 2012. [PUBMED Abstract]
2. Soole F, Maupain C, Defachelles AS, et al.: Synovial sarcoma relapses in children and adolescents: prognostic factors, treatment, and outcome. Pediatr Blood Cancer 61 (8): 1387-93, 2014. [PUBMED Abstract]
3. Bergamaschi L, Bisogno G, Manzitti C, et al.: Salvage rates and prognostic factors after relapse in children and adolescents with malignant peripheral nerve sheath tumors. Pediatr Blood Cancer 65 (2): , 2018. [PUBMED Abstract]
4. Belal A, Salah E, Hajjar W, et al.: Pulmonary metastatectomy for soft tissue sarcomas: is it valuable? J Cardiovasc Surg (Torino) 42 (6): 835-40, 2001. [PUBMED Abstract]
5. Zagars GK, Ballo MT, Pisters PW, et al.: Prognostic factors for disease-specific survival after first relapse of soft-tissue sarcoma: analysis of 402 patients with disease relapse after initial conservative surgery and radiotherapy. Int J Radiat Oncol Biol Phys 57 (3): 739-47, 2003. [PUBMED Abstract]
6. Stanelle EJ, Christison-Lagay ER, Wolden SL, et al.: Pulmonary metastasectomy in pediatric/adolescent patients with synovial sarcoma: an institutional review. J Pediatr Surg 48 (4): 757-63, 2013. [PUBMED Abstract]
7. Maki RG, Wathen JK, Patel SR, et al.: Randomized phase II study of gemcitabine and docetaxel compared with gemcitabine alone in patients with metastatic soft tissue sarcomas: results of sarcoma alliance for research through collaboration study 002 [corrected]. J Clin Oncol 25 (19): 2755-63, 2007. [PUBMED Abstract]
8. Le Cesne A, Cresta S, Maki RG, et al.: A retrospective analysis of antitumour activity with trabectedin in translocation-related sarcomas. Eur J Cancer 48 (16): 3036-44, 2012. [PUBMED Abstract]
9. Garcia-Carbonero R, Supko JG, Maki RG, et al.: Ecteinascidin-743 (ET-743) for chemotherapy-naive patients with advanced soft tissue sarcomas: multicenter phase II and pharmacokinetic study. J Clin Oncol 23 (24): 5484-92, 2005. [PUBMED Abstract]
10. Garcia-Carbonero R, Supko JG, Manola J, et al.: Phase II and pharmacokinetic study of ecteinascidin 743 in patients with progressive sarcomas of soft tissues refractory to chemotherapy. J Clin Oncol 22 (8): 1480-90, 2004. [PUBMED Abstract]
11. van der Graaf WT, Blay JY, Chawla SP, et al.: Pazopanib for metastatic soft-tissue sarcoma (PALETTE): a randomised, double-blind, placebo-controlled phase 3 trial. Lancet 379 (9829): 1879-86, 2012. [PUBMED Abstract]
12. Glade Bender JL, Lee A, Reid JM, et al.: Phase I pharmacokinetic and pharmacodynamic study of pazopanib in children with soft tissue sarcoma and other refractory solid tumors: a children's oncology group phase I consortium report. J Clin Oncol 31 (24): 3034-43, 2013. [PUBMED Abstract]
13. Casanova M, Basso E, Magni C, et al.: Response to pazopanib in two pediatric patients with pretreated relapsing synovial sarcoma. Tumori 103 (1): e1-e3, 2017. [PUBMED Abstract]
14. Tawbi HA, Burgess M, Bolejack V, et al.: Pembrolizumab in advanced soft-tissue sarcoma and bone sarcoma (SARC028): a multicentre, two-cohort, single-arm, open-label, phase 2 trial. Lancet Oncol 18 (11): 1493-1501, 2017. [PUBMED Abstract]

The PDQ cancer information summaries are reviewed regularly and updated as new information becomes available. This section describes the latest changes made to this summary as of the date above.

This summary was comprehensively reviewed.

This summary is written and maintained by the PDQ Pediatric Treatment Editorial Board, which is editorially independent of NCI. The summary reflects an independent review of the literature and does not represent a policy statement of NCI or NIH. More information about summary policies and the role of the PDQ Editorial Boards in maintaining the PDQ summaries can be found on the About This PDQ Summary and PDQ® Cancer Information for Health Professionals pages.