Estimated new cases and deaths from HL in the United States in 2024:[1]
Up to 90% of all newly diagnosed patients with HL can be cured with combination chemotherapy and/or radiation therapy.[2]
HL most frequently presents in lymph node groups above the diaphragm and/or in mediastinal lymph nodes. Involvement of Waldeyer's ring or tonsillar lymph glands is rarely seen.
Risk factors for HL include:
These and other signs and symptoms may be caused by HL or by other conditions:
Treatment of HL should relieve these symptoms within days. For more information, see Hot Flashes and Night Sweats, Pruritus, and Fatigue.
Diagnostic evaluation of patients with lymphoma may include:
All stages of HL can be subclassified into A and B categories: B for those with defined general symptoms (described below) and A for those without B symptoms. The B designation is given to patients with any of the following symptoms:
The most significant B symptoms are fevers and weight loss. Night sweats alone do not confer an adverse prognosis.
The prognosis for a given patient depends on several factors. The most important factors include:[1,4,5]
Other important factors are:[1,4,5]
The best predictor of treatment failure is a PET-CT scan obtained after two cycles of chemotherapy (PET2 scan).[6,7] For limited-stage disease, there are frequent false-positive tests because the relapse risk is low (low-positive predictive value). For advanced-stage disease, up to 15% of patients have a relapse despite a negative PET2 scan (lowering the negative predictive value).[6,7] Combining biomarkers with PET-CT scanning responses or calculating metabolic tumor volume with PET-CT scanning are methods under evaluation to improve prognostic predictions.[6,8-11]
Recommendations for posttreatment follow-up are not evidence based, but a variety of opinions have been published for high-risk patients who present with advanced-stage disease and for patients who achieve less-than-complete remission by PET-CT scans at the end of therapy.[12-15] For patients at high risk of relapse, conventional CT scans are used to avoid increased false-positive test results and increased radiation exposure of serial PET-CT scans.[16]
For patients with negative findings from a PET-CT scan at the end of therapy, routine scans are not advised because of the very low risk of recurrence.[17] Opportunistic scanning is applied when patients present with suspicious symptoms, physical findings, or laboratory test results. The 5-year risk of relapse from diagnosis is 5.6% for patients remaining event-free for 2 years after induction therapy.[18]
Among 6,840 patients enrolled in German Hodgkin Study Group (GHSG) trials, with a median follow-up of 10.3 years, 141 patients had a relapse after 5 years, compared with 466 patients who had a relapse within 5 years. Treatment-related adverse effects and late relapses may occur beyond 20 years of follow-up.[19]
Patients who complete therapy for HL are at risk of developing long-term side effects, ranging from direct damage to organ function or the immune system to second malignancies. For the first 15 years after treatment, HL is the main cause of death. By 15 to 20 years after therapy, the cumulative mortality from a second malignancy, cardiovascular disease, or pulmonary fibrosis exceeds the cumulative mortality from HL.[20-23] This risk of developing a second malignancy is even higher for individuals with a family history of cancer.[24]
Compared with the general population, long-term survivors of HL have a significantly lower life expectancy.[25] A multicenter cohort study of 4,919 patients treated between 1965 and 2000 and before age 51 years had a median follow-up of 20.2 years. Patients with HL had an absolute excess mortality (AEM) of 123 excess deaths per 10,000 person-years. This risk (standardized mortality ratio, 5.2; 95% confidence interval [CI], 4.2–6.5; AEM, 619) was maintained for 40-year survivors.[25] For example, at age 54 years, the cumulative mortality of 20.0% for HL survivors was commensurate with that of a 71-year-old person from the general population. While mortality from HL dropped precipitously from 1965 to 2000, solid tumor mortality did not change over that time.[25]
Recommendations for screening for secondary malignancies or follow-up of long-term survivors are consensus based and not derived from randomized trials.[26]
An increase in second solid tumors has also been observed, especially mesothelioma and cancers of the lung, breast, thyroid, bone/soft tissue, stomach, esophagus, colon and rectum, uterine cervix, and head and neck.[27-34] These tumors occur primarily after radiation therapy or with combined-modality treatment (especially when involving mechlorethamine or procarbazine), and approximately 75% occur within radiation ports. The risk of developing a second solid tumor (cumulative incidence of a second cancer) increases with time after treatment.
In a cohort of 18,862 5-year survivors from 13 population-based registries, the younger patients had elevated risks for breast, colon, and rectal cancers for 10 to 25 years before the ages when routine screening is recommended in the general population.[29] Even with involved-field doses of 15 Gy to 25 Gy, sarcomas, breast cancers, and thyroid cancers occurred with similar incidence in young patients, compared with those receiving higher-dose radiation.[35]
Lung cancer and breast cancer are among the most-common second solid tumors that develop after therapy for HL.
In two case-control studies of 479 patients who developed breast cancer after therapy for HL, cumulative absolute risks for developing breast cancer were calculated as a function of radiation therapy dose and the use of chemotherapy.[50,51] With a 30-year to 40-year follow-up, cumulative absolute risks of breast cancer with exposure to radiation range from 8.5% to 39.6%, depending on age at diagnosis. These cohort studies show a continued increase in cumulative excess risk of breast cancer beyond 20 years of follow-up.[50,51]
In a nested case-control study and subsequent cohort study, patients who received both chemotherapy and radiation therapy had a statistically significant lower risk of developing breast cancer than did those treated with radiation therapy alone.[43,52] Reaching early menopause with fewer than 10 years of intact ovarian function appeared to account for the reduction in risk among patients who received combined-modality therapy.[52] Reduction of radiation volume also decreased the risk of breast cancer after HL.[52]
Late effects of autologous stem cell transplant for failure of induction chemotherapy include second malignancies, hypothyroidism, hypogonadism, herpes zoster, depression, and cardiac disease.[53]
Treatment of HL also affects the endocrine, cardiac, pulmonary, skeletal, and immune systems. Chronic fatigue can be a debilitating symptom for some long-term survivors.[57] A retrospective survey of 20,007 patients with early- and advanced-stage classical HL treated between 2000 and 2016 (i.e., the era in which ABVD became the preferred frontline chemotherapy regimen) showed 1,321 deaths not attributable to lymphoma (39% of total deaths). Heart disease (estimated EAR: 6.6 per 10,000 patient-years, standardized mortality ratio, 1.7 for early-stage disease and 15.1 per 10,000 patient-years, standardized mortality ratio, 2.1 for advanced-stage disease) and infection (estimated EAR: 3.1 per 10,000 patient-years, standardized mortality ratio, 2.2 for early-stage disease and 10.6 per 10,000 patient-years, standardized mortality ratio, 3.9 for advanced-stage disease) were the leading causes of death, especially in patients older than 60 years.[58]
Infertility. A toxic effect that is primarily related to chemotherapy is infertility, usually after regimens containing MOPP or BEACOPP (bleomycin, etoposide, doxorubicin, cyclophosphamide, vincristine, procarbazine, and prednisone).[59-61] After six to eight cycles of BEACOPP, most men had testosterone levels within reference range; however, 82% of women younger than 30 years recovered menses (mostly within 12 months), but only 45% of women older than 30 years recovered menses.[62] ABVD appears to spare long-term testicular and ovarian function.[60,63,64] Increasing age and alkylator-based regimens are the two major factors increasing the risk of premature ovarian insufficiency.[62,65,66] A prospective evaluation of gonadal function embedded in the randomized Response-Adapted Therapy in Advanced Hodgkin Lymphoma (RATHL) study for patients with newly diagnosed advanced-stage HL found good recovery of anti-Müllerian hormone concentration and reduction in follicle-stimulating hormone after ABVD or AVD (doxorubicin, vinblastine, dacarbazine), but less recovery after BEACOPP and for women older than 35 years.[65] A PET scan-adapted treatment regimen to reduce the use of BEACOPP also resulted in less infertility and gonadal dysfunction.[67] While cryopreservation of oocytes or sperm remains the first choice for preservation of fertility, luteinizing hormone-releasing hormone agonists can be tried in this setting, although efficacy for patients with HL has not been confirmed as has been confirmed for patients with breast cancer.[68] A national Danish registry of 793 HL survivors showed that patients who did not have a relapse had similar parenthood rates to the general population, but assistive reproduction methods were required more often for HL survivors (male, 21.6% vs. 6.3%; female, 13.6% vs. 5.5%; P ≤ .001 for both comparisons).[69]
Hypothyroidism. Hypothyroidism is a late complication primarily related to radiation therapy.[70-72] Long-term survivors who receive radiation therapy to the neck are followed up with annual thyroid-stimulating hormone testing.
Cardiac disease. A late complication primarily related to radiation therapy is cardiac disease, the risk of which may persist for over 30 years after the first treatment.[70,73-81] The EAR of fatal cardiovascular disease ranges from 11.9 to 48.9 per 10,000 patient-years and is mostly attributable to fatal myocardial infarction (MI).[73-75,77] A retrospective survey of over 6,000 patients with HL treated in trials between 1964 and 2004 found that cardiac exposure to radiation and use of doxorubicin were significant predictors of ischemic heart disease, congestive heart failure, arrhythmias, and vascular disease.[79] In a cohort of 7,033 patients with HL, MI mortality risk persisted for 25 years after first treatment with supradiaphragmatic radiation therapy (dependent on the details of treatment planning), doxorubicin, or vincristine.[77,78] A nested case-control study of 2,617 5-year survivors of HL diagnosed before age 51 years and treated between 1965 and 1995 found that the 25-year risk of moderate to severe heart failure increased for patients receiving anthracyclines. The risk ranged from 11.2% for patients exposed to 0 Gy to 15 Gy radiation up to 32.9% for patients exposed to radiation equal or greater than 21 Gy.[82] The use of subcranial blocking did not reduce the incidence of fatal MI in a retrospective review, perhaps because of the exposure of the proximal coronary arteries to radiation.[74] Compared with a general matched population, HL patients treated with mediastinal radiation were at increased risk of complications, especially during cardiac surgery.[83] Risk prediction models rely on the dose of mediastinal radiation, smoking history, male sex, and anthracycline exposure to define the patients at highest risk.[81] These risk prediction models found that mediastinal radiation therapy combined with doxorubicin exposure conferred the highest risk, followed by mediastinal radiation therapy alone.[81]
In the U.K. RAPID trial, performed between 2003 and 2010, 183 patients with early-stage HL were PET-negative but still received involved-field radiation therapy (IFRT) (20 Gy) after receiving ABVD.[80] The average predicted 30-year cardiovascular mortality was 5.02%, which included 3.52% expected in the general population, 0.94% EAR from the doxorubicin, and 0.56% from the IFRT. Since 2010, radiation therapy techniques have advanced by using smaller target volumes, lower-dose IFRT (20 Gy), deep inspiration breath holding, intensity-modulated radiation therapy, and proton beam therapy.[80] These techniques will need further evaluation to better assess cardiovascular risks from radiation therapy.
Pulmonary impairment. Impairment of pulmonary function may occur as a result of mantle-field radiation therapy; this impairment is not usually clinically evident, and recovery in pulmonary testing often occurs after 2 to 3 years.[84] Pulmonary toxic effects from bleomycin as used in ABVD are seen in patients older than 40 years.[85]
Bone necrosis. Avascular necrosis of bone has been observed in patients treated with chemotherapy and is most likely related to corticosteroid therapy.[86]
Bacterial sepsis. Bacterial sepsis may occur rarely after splenectomy performed during staging laparotomy for HL;[87] it is much more common in children than in adults.
Fatigue. Fatigue is a commonly reported symptom among patients who have completed chemotherapy and radiation therapy. In a case-control study design, most HL survivors reported significant fatigue lasting for more than 6 months after therapy, compared with age-matched controls. Quality-of-life questionnaires given to 5,306 patients on GHSG trials showed that 20% of patients complained of severe fatigue 5 years after therapy, and those patients had significantly increased problems with employment and financial stability.[88-90] For more information, see Fatigue.
Neurocognitive impairment. After a median of 23 years from diagnosis, 1,760 HL survivors treated in childhood were compared with 3,180 siblings. Significantly higher rates of memory loss (8.1% vs. 5.7%; P < .05), anxiety (7.0% vs. 5.4%; P < .05), unemployment (9.6% vs. 4.4%; P < .05), depression (9.1% vs. 7.0%; P < .05), and impaired physical quality of life (11.2% vs. 3.0%; P < .05) were reported.[91] Lower risks were associated with survivors who adhered to exercise guidelines and did not smoke, but the design of this study did not allow a cause-and-effect conclusion.
Pathologists currently use the World Health Organization (WHO) modification of the Revised European-American Lymphoma (REAL) classification for the histological classification of Hodgkin lymphoma (HL).[1,2]
The typical immunophenotype for classic HL is CD15+, CD20-, CD30+, CD45-, while the profile for lymphocyte-predominant disease is CD15-, CD20+, CD30-, CD45+.
Clinical staging for patients with Hodgkin lymphoma (HL) includes:
Staging laparotomy is no longer recommended and should be considered only when the results will allow substantially less treatment. Staging laparotomy should not be done in patients who require chemotherapy. If the laparotomy is required for treatment decisions, the risks of potential morbidity should be considered.[3-6]
Bone marrow involvement occurs in 5% of patients and is more prevalent in the context of constitutional B symptoms and anemia, leukopenia, or thrombocytopenia. In a retrospective review and meta-analysis of 955 patients in nine studies, fewer than 2% of patients with positive bone marrow biopsy results had only stage I or stage II disease on PET-CT scans.[7] Omission of the bone marrow biopsy for PET-CT–designated early-stage patients did not change treatment selection.[7] In addition, focal skeletal bone lesions on PET-CT predicted bone marrow involvement with a 96.9% (95% confidence interval [CI], 93.0%–99.08%) sensitivity and 99.7% (95% CI, 98.9%–100%) specificity.[7] For these reasons, PET-CT has replaced bone marrow biopsy in the clinical staging of newly diagnosed HL.
Massive mediastinal disease has been defined by the Cotswolds meeting as a thoracic ratio of maximum transverse mass diameter of 33% or more of the internal transverse thoracic diameter measured at the T5/6 intervertebral disc level on chest radiography.[1] Some investigators have designated a lymph node mass measuring 10 cm or more in greatest dimension as massive disease.[8] Other investigators use a measurement of the maximum width of the mediastinal mass divided by the maximum intrathoracic diameter.[9]
The American Joint Committee on Cancer (AJCC) has adopted the Lugano classification to evaluate and stage lymphoma.[10] The Lugano classification system replaces the Ann Arbor classification system, which was adopted in 1971 at the Ann Arbor Conference,[11] with some modifications 18 years later from the Cotswolds meeting.[1]
Stage | Stage Description | Illustration |
---|---|---|
CSF = cerebrospinal fluid; CT = computed tomography; DLBCL = diffuse large B-cell lymphoma; NHL = non-Hodgkin lymphoma. | ||
aHodgkin and Non-Hodgkin Lymphomas. In: Amin MB, Edge SB, Greene FL, et al., eds.: AJCC Cancer Staging Manual. 8th ed. New York, NY: Springer, 2017, pp. 937–58. | ||
bStage II bulky may be considered either early or advanced stage based on lymphoma histology and prognostic factors. | ||
cThe definition of disease bulk varies according to lymphoma histology. In the Lugano classification, bulk ln Hodgkin lymphoma is defined as a mass greater than one-third of the thoracic diameter on CT of the chest or a mass >10 cm. For NHL, the recommended definitions of bulk vary by lymphoma histology. In follicular lymphoma, 6 cm has been suggested based on the Follicular Lymphoma International Prognostic Index-2 and its validation. In DLBCL, cutoffs ranging from 5 cm to 10 cm have been used, although 10 cm is recommended. | ||
Limited stage | ||
I | Involvement of a single lymphatic site (i.e., nodal region, Waldeyer’s ring, thymus, or spleen). | |
IE | Single extralymphatic site in the absence of nodal involvement (rare in Hodgkin lymphoma). | |
II | Involvement of two or more lymph node regions on the same side of the diaphragm. | |
IIE | Contiguous extralymphatic extension from a nodal site with or without involvement of other lymph node regions on the same side of the diaphragm. | |
II bulkyb | Stage II with disease bulk.c | |
Advanced stage | ||
III | Involvement of lymph node regions on both sides of the diaphragm; nodes above the diaphragm with spleen involvement. | |
IV | Diffuse or disseminated involvement of one or more extralymphatic organs, with or without associated lymph node involvement; or noncontiguous extralymphatic organ involvement in conjunction with nodal stage II disease; or any extralymphatic organ involvement in nodal stage III disease. Stage IV includes any involvement of the CSF, bone marrow, liver, or multiple lung lesions (other than by direct extension in stage IIE disease). | |
Note: Hodgkin lymphoma uses A or B designation with stage group. A/B is no longer used in NHL. |
The E designation is used when well-localized extranodal lymphoid malignancies arise in or extend to tissues beyond, but near, the major lymphatic aggregates. Stage IV refers to disease that is diffusely spread throughout an extranodal site, such as the liver. If pathological proof of involvement of one or more extralymphatic sites has been documented, the symbol for the site of involvement, followed by a plus sign (+), is listed.
N = nodes | H = liver | L = lung | M = bone marrow |
S = spleen | P = pleura | O = bone | D = skin |
Many investigators and many new clinical trials employ a clinical staging system that divides patients into three major groups that are also useful for the clinician:[12]
The group assignment depends on:
Early-stage adverse prognostic factors:
Early favorable group: Clinical stage I or II without any of the adverse prognostic factors listed above.
Early unfavorable group: Clinical stage I or II with one or more of the adverse prognostic factors listed above.
Advanced-stage adverse prognostic factors:
For patients with advanced-stage HL, the International Prognostic Factors Project on Advanced Hodgkin's Disease developed the International Prognostic Index with a score that is based on the following seven adverse prognostic factors:[13]
Advanced group: Clinical stage III or IV with up to three of the adverse risk factors listed above. Patients with advanced disease have a 60% to 80% rate of freedom from progression of disease at 5 years from treatment with first-line chemotherapy.[13][Level of evidence C2] An updated clinical prediction model uses continuous variables listed for the International Prognostic Index above, with an online calculator available.[14]
After initial clinical staging for Hodgkin lymphoma (HL), patients with early favorable disease or early unfavorable disease are treated with ABVD (doxorubicin, bleomycin, vinblastine, and dacarbazine) chemotherapy with or without involved-field or nodal radiation.
Patients with advanced-stage disease are primarily treated with chemotherapy alone, although subsequent radiation therapy may be applied for initial bulky disease (≥10 cm mediastinal mass) or for residual adenopathy (>2.5 cm) with positive findings after a postchemotherapy positron emission tomography (PET) scan.[1] Treatment regimen preferences and application, as well as relative risks, differ regionally.
Patients with HL who are older than 60 years may have more treatment-related morbidity and mortality; maintaining the dose intensity of standard chemotherapy may be difficult.[2,3] Other therapies have been proposed for older patients with lower tolerance for conventional regimens, but no randomized trials have been conducted with these regimens.[4] Twenty-seven previously untreated patients older than 60 years, judged by the investigator to be in poor condition and unable to undergo chemotherapy, received brentuximab vedotin. A 92% overall response rate and 73% complete remission rate were reported.[5][Level of evidence C3] Brentuximab vedotin has been combined with dacarbazine [6] or sequentially with AVD (doxorubicin, vinblastine, dacarbazine) [7], reporting acceptable toxicities in an older population. A retrospective review of 287 patients aged 60 years or older with early-stage favorable HL in two German Hodgkin Study Group (GHSG) trials (HD10 and HD13) showed increased bleomycin-induced lung toxicity with more than two cycles of exposure to bleomycin.[8]
Prognostic Group | Treatment Options |
---|---|
Early favorable classic HL | Chemotherapy with or without radiation therapy |
Early unfavorable classic HL | Chemotherapy with or without radiation therapy |
Advanced classic HL | Chemotherapy |
Recurrent classic HL | Pembrolizumab or nivolumab (alone or with chemotherapy) |
Brentuximab vedotin | |
Brentuximab vedotin plus nivolumab | |
Chemotherapy with stem cell transplant | |
Combination chemotherapy | |
Radiation therapy | |
NLPHL | Watchful waiting/active surveillance |
Radiation therapy | |
Chemotherapy | |
Rituximab | |
HL during pregnancy | Watchful waiting |
Radiation therapy | |
Chemotherapy | |
HL = Hodgkin lymphoma; NLPHL = nodular lymphocyte-predominant Hodgkin lymphoma. |
Table 4 describes the chemotherapy regimens used in the treatment of HL.
Combination Name | Drugs Included | Prognostic Group |
---|---|---|
ABVD | Doxorubicin, bleomycin, vinblastine, and dacarbazine | Early favorable classic |
Early unfavorable classic | ||
AVD | Doxorubicin, vinblastine, and dacarbazine | Early favorable classic |
Advanced classic | ||
BEACOPP | Bleomycin, etoposide, doxorubicin, cyclophosphamide, vincristine, procarbazine, and prednisone | Early unfavorable classic |
Advanced classic | ||
GVD | Gemcitabine, vinorelbine, and liposomal doxorubicin | Recurrent classic |
ICE | Ifosfamide, carboplatin, and etoposide | Recurrent classic |
MOPP | Mechlorethamine, vincristine, procarbazine, and prednisone | Advanced classic |
Radiation therapy alone is almost never used to treat patients newly diagnosed with early favorable classic HL.[9] In HL, the appropriate dose of radiation alone is 20 Gy to 30 Gy to clinically uninvolved sites and 30 Gy to 36 Gy to regions of initial nodal involvement.[9-11] When mediastinal radiation will encompass the left side of the heart or will increase breast cancer risk in young female patients, proton therapy may be considered to reduce the radiation dose to organs at risk.[12] When used as a single modality, radiation therapy is delivered to the neck, chest, and axilla (mantle field) and then to an abdominal field to treat para-aortic nodes and the spleen (splenic pedicle). In some patients, pelvic nodes are treated with a third field. The three fields constitute total nodal radiation therapy. In some cases, the pelvic and para-aortic nodes are treated in a single field called an inverted Y.[9-11]
Patients are designated as having early favorable classic Hodgkin lymphoma (HL) when they have clinical stage I or stage II disease and none of the following adverse prognostic factors:
Treatment options for early favorable classic HL include:
Treatment options include:
Historically, radiation therapy alone was the primary treatment for patients with early favorable classic HL, often after confirmatory negative staging laparotomy.
The late mortality from solid tumors (especially in the lung, breast, gastrointestinal tract, and connective tissue) and cardiovascular disease makes radiation therapy a less-attractive option for the best-risk patients, who have the highest probability of cure and long-term survival.[4-8] Clinical trials have focused on regimens with chemotherapy and IFRT or with chemotherapy alone.[1]
Evidence (chemotherapy and/or radiation therapy):
For patients with early favorable classic HL, the following four trials established ABVD alone for four cycles or ABVD for two cycles plus 20 Gy of IFRT.
The following results were observed for the trial:
Other trials have investigated the role of positron emission tomography (PET) scans for early favorable HL.
However, two of the trials showed an increased risk of relapse when radiation therapy was omitted. In the GHSG HD16 trial, for the 628 patients with PET2-negative disease (PET after two cycles of ABVD), the 5-year PFS rate was 93.4% (95% CI, 90.4%–96.5%) with combined modality therapy and 86.1% (95% CI, 81.4%–90.0%) with ABVD alone (HR, 1.78; 95% CI, 1.02–3.12).[18] A subsequent analysis of the GHSG HD16 trial showed that most of the recurrences occurred in the proposed radiation field.[15] In the EORTC/LYSA/FIL H10 trial, the 10-year PFS rate was 98.8% with three cycles of ABVD plus radiation therapy and 85.4% with four cycles of ABVD without radiation therapy (HR, 13.2; 95% CI, 3.1–55.8; P < .001).[17]
In summary, this 7% to 13% difference in PFS without a difference in OS can be seen either as a mandate to combine radiation therapy with ABVD to avoid recurrences or as a rationale to give four or more cycles of AVBD when omitting radiation therapy.
In the RAPID study (NCT00943423), patients with postchemotherapy PET-CT Deauville scores of 5 (uptake ≥3 times maximum liver uptake) had inferior 5-year PFS rates (61.9%; 95% CI, 41.1%–82.7%) and 5-year OS rates (85.2%; 95% CI, 69.7%–100%) (P = .002) when compared with patients with Deauville scores of 1 to 4 (P < .001).[19]
Older patients with early favorable HL have also been studied.
For older patients (>60 years) with early favorable disease, when more than two cycles of ABVD are required, bleomycin may be omitted to avoid pulmonary toxicity.
Summary of early favorable classic HL:
Use our advanced clinical trial search to find NCI-supported cancer clinical trials that are now enrolling patients. The search can be narrowed by location of the trial, type of treatment, name of the drug, and other criteria. General information about clinical trials is also available.
Patients are designated as having early unfavorable classic Hodgkin lymphoma (HL) when they have clinical stage I or stage II disease and one or more of the following risk factors:
A retrospective review found that infradiaphragmatic early-stage disease appears to have an inferior outcome compared with the more frequent (>90%) supradiaphragmatic disease, with a decrement in overall survival (OS) rates of 6% (91.5% vs. 97.6%; P < .001).[1][Level of evidence C2]
Treatment options for early unfavorable classic HL include:
Treatment options include:[2,3]
See Table 4 for a description of the chemotherapy regimens used to treat HL.
Evidence (chemotherapy and radiation therapy):
The following results were observed:
The following results were observed:
Could the radiation therapy be omitted to minimize late morbidity and mortality from secondary solid tumors and from cardiovascular disease?[3]
A Cochrane meta-analysis of 1,245 patients in five randomized clinical trials suggested improved survival for combined-modality therapy versus chemotherapy alone (HR, 0.40; 95% CI, 0.27–0.61).[12] However, the five randomized trials that were analyzed had inadequate follow-up to account for the late toxicities and increased mortality seen with radiation therapy after 10 years.
Other trials have investigated the role of positron emission tomography‒computed tomography (PET-CT) scans for patients with early unfavorable HL.
This trial supports adding escalated BEACOPP to ABVD for patients with early unfavorable classic HL who have positive PET-CT results after two cycles.
To summarize:
Patients with bulky disease (≥10 cm) or massive mediastinal involvement were excluded from most of the trials. On the basis of historical comparisons to chemotherapy or radiation therapy alone, these patients receive combined-modality therapy.[18-20][Level of evidence C2] A retrospective review published in a preliminary abstract reported on 194 patients with bulky disease who had PET-CT scans at the completion of chemotherapy; 112 of them had negative PET results (Deauville score of 1 or 2).[21] The observed 86% OS rate at 5 years suggests that radiation therapy can be excluded for patients with massive mediastinal disease who have negative PET-CT scan results after six cycles of therapy.[21][Level of evidence C2]
Use our advanced clinical trial search to find NCI-supported cancer clinical trials that are now enrolling patients. The search can be narrowed by location of the trial, type of treatment, name of the drug, and other criteria. General information about clinical trials is also available.
The following adverse prognostic factors for advanced classic Hodgkin lymphoma (HL) have been combined into the International Prognostic Score for advanced-stage HL:[1]
No. of Risk Factors | 5-Year FFP (%) | 5-Year OS (%) |
---|---|---|
FFP = freedom from progression; No. = number; OS = overall survival. | ||
0 | 88 | 98 |
1 | 84 | 97 |
2 | 80 | 92 |
3 | 74 | 91 |
4 | 67 | 88 |
≥5 | 62 | 73 |
Even the highest-risk patients in this index have a 5-year freedom from progression rate above 60% and a 5-year overall survival (OS) rate above 70%.[1]
Treatment options for advanced classic HL include:
The chemotherapy regimen BV-AVD (brentuximab vedotin [an antibody-drug conjugate directed against CD30] + doxorubicin, vinblastine, and dacarbazine) is administered for six cycles. This replaces ABVD (doxorubicin, bleomycin, vinblastine, and dacarbazine), the previous standard regimen for three decades.[2,3] The ABVD regimen remains a viable option in cost-conscious settings.
See Table 4 for a description of the chemotherapy regimens used to treat HL.
Evidence (chemotherapy):
Multiple studies have addressed the role of radiation therapy consolidation after induction chemotherapy for advanced-stage HL.
A randomized prospective trial with a median follow-up of 5.9 years included 320 patients with advanced-stage HL and a large nodal mass (≥5 cm). Patients were randomly assigned to receive radiation therapy or no further treatment after six cycles of ABVD. For patients with a complete metabolic response on positron emission tomography (PET)–computed tomography (CT) after six cycles of ABVD, there was no difference in the 6-year PFS rate for patients who received radiation therapy (91%; 95% CI, 84%–99%) versus patients who received no further treatment (95%; 95% CI, 89%–100%, P = .62).[21][Level of evidence B1]
Other trials have investigated the role of PET scans in patients with advanced classic HL.
Older patients with advanced-stage HL have also been studied.
Summary of advanced-stage classic HL:
Use our advanced clinical trial search to find NCI-supported cancer clinical trials that are now enrolling patients. The search can be narrowed by location of the trial, type of treatment, name of the drug, and other criteria. General information about clinical trials is also available.
More than one-half of all patients with recurrent Hodgkin lymphoma (HL) can achieve long-term disease-free survival (DFS), or even cure, using reinduction therapy followed by stem cell/bone marrow transplant consolidation.[1] In this regard, the disease follows a 75% rule: 75% of patients attain a clinical complete remission with salvage therapy reinduction, and then 75% of patients who undergo autologous stem cell transplant (SCT) are free of disease at 4 years. Poor prognostic factors include:[2-4]
Treatment options for recurrent classic HL include:
The anti-programmed cell death-1 (PD-1) monoclonal antibodies pembrolizumab and nivolumab are immune checkpoint inhibitors.
Evidence: (pembrolizumab):
Evidence (nivolumab alone or nivolumab plus ICE):
Brentuximab vedotin is an antibody-drug conjugate directed against CD30.[15-17] CD30 is a target for therapy because it is expressed on malignant Reed-Sternberg cells of HL but has limited expression on normal cells. Brentuximab vedotin is well tolerated by patients and can be used to achieve a clinical complete response before autologous or allogeneic SCT.
Evidence (brentuximab vedotin):
Evidence (brentuximab vedotin plus nivolumab):
Patients whose HL relapses after initial combination chemotherapy can undergo reinduction with the same or another chemotherapy regimen followed by high-dose chemotherapy and autologous bone marrow or peripheral stem cell or allogeneic bone marrow rescue.[1,28-31] This therapy has resulted in 3- to 4-year DFS rates of up to 50%. Patients who are responsive to reinduction therapy may have a better prognosis after subsequent autologous SCT; in one analysis, the 3-year event-free survival (EFS) rate was 80% with negative PET-CT scan results and 29% with positive PET-CT scan results.[32]
Patients who do not respond to induction chemotherapy (about 20%‒25% of all presenting patients) have survival rates lower than 10% at 8 years.[3] For these patients, high-dose chemotherapy and autologous bone marrow or peripheral stem cell or allogeneic bone marrow rescue [28,29,33-35] have resulted in 5-year DFS rates of around 25% to 30%, but selection bias clearly influences these numbers.[28,29,34,36,37]
In a retrospective review of 105 patients, those older than 60 years fared better with a combination of chemotherapy and salvage radiation therapy than with the use of intensified transplant consolidation.[38][Level of evidence C3]
The use of HLA-matched sibling marrow (allogeneic transplant) results in lower relapse rates, but the benefit may be offset by increased toxic effects.[28,39,40] Reduced-intensity conditioning for allogeneic SCT is also under clinical evaluation.[41-43]
Evidence (chemotherapy with SCT):
After completion of autologous SCT for recurrent HL, 329 patients were randomly assigned to receive brentuximab vedotin or placebo in a double-blind trial (AETHERA [NCT01100502]).[22,23]
A phase II trial reported a response rate higher than 50% for bendamustine in relapsing ABMT patients.[49][Level of evidence C3] For patients with recurrent disease after ABMT, weekly vinblastine therapy has provided palliation with minimal toxic effects.[50][Level of evidence C3]
For patients who experience a relapse after initial combination chemotherapy, prognosis is determined more by the duration of the first remission than by the specific induction or salvage combination chemotherapy regimen. Patients whose initial remission after chemotherapy was longer than 1 year (late relapse) have long-term survival rates of 22% to 71% with salvage chemotherapy.[2-4,51-53] Patients whose initial remission after chemotherapy was shorter than 1 year (early relapse) do much worse and have long-term survival rates of 11% to 46%.[2,3,54]
It is rare to see a patient who received only radiation therapy for initial treatment, but patients who experience a relapse after initial wide-field, high-dose radiation therapy have a good prognosis. Combination chemotherapy results in 10-year DFS rates of 57% to 81% and OS rates of 57% to 89%.[2,55-57]
For the small subgroup of patients with only limited nodal recurrence following initial chemotherapy, radiation therapy with or without additional chemotherapy may provide long-term survival for about 50% of these highly selected patients.[58,59]
Use our advanced clinical trial search to find NCI-supported cancer clinical trials that are now enrolling patients. The search can be narrowed by location of the trial, type of treatment, name of the drug, and other criteria. General information about clinical trials is also available.
Immunophenotypic differences distinguish NLPHL (CD15-, CD20+, CD30-) from lymphocyte-rich classic Hodgkin lymphoma (HL) (CD15+, CD20-, CD30+).[1,2] The largest retrospective report of 426 cases showed no significant difference in clinical response or outcome to standard therapies for these two subgroups when patients present with early-stage disease (stage I or II).[3][Level of evidence C1]
Patients with NLPHL have earlier-stage disease and longer survival than those with classic HL.[4,5] NLPHL is usually diagnosed in asymptomatic younger patients with cervical or inguinal lymph nodes; this usually occurs without mediastinal involvement. Unlike patients with classic HL, bulky disease, B symptoms, and contiguous spread are uncommon in patients with NLPHL.[6,7] An international prognostic score identified age 45 years or older, stage III or IV disease, hemoglobin less than 10.5 g/dL, and splenic involvement as poor prognostic factors for NLPHL.[8]
Treatment options for NLPHL include:
Because of the favorable prognosis for NLPHL and the potential long-term side effects of therapy, studies have evaluated watchful waiting or active surveillance for patients with asymptomatic, low tumor burden disease.[9] In a retrospective comparison, 37 such patients managed with active surveillance had a 5-year progression-free survival (PFS) rate of 77%, versus 85% for patients receiving active treatment.[10][Level of evidence C3]
Limited-field radiation therapy is the most-common treatment approach for patients with early-stage disease. This histology is rare, but this approach is based on retrospective analysis spanning several decades.[5,11-15]
Patients with nonbulky lymphocyte–predominant disease presenting in unilateral high neck (above the thyroid notch) or epitrochlear locations require only involved-field radiation therapy (IFRT) after clinical staging.[16] A retrospective report of 426 cases of lymphocyte-predominant HL (including the nodular lymphocyte–predominant and lymphocyte-rich classic subtypes) showed that more patients died of acute and long-term treatment-related toxicity than of recurrent HL.[3][Level of evidence C1] Limitation of radiation dose and radiation fields and avoidance of leukemogenic chemotherapeutic agents, along with watchful waiting policies, should be investigated for these subgroups.[15,17]
For patients with early-stage NLPHL, ABVD (doxorubicin, bleomycin, vinblastine, and dacarbazine) for two to three cycles has been combined with IFRT on the basis of anecdotal single-arm trials.[5,18]
For patients with advanced-stage NLPHL, chemotherapy regimens designed for patients with non-Hodgkin lymphomas, such as R-CHOP (rituximab, cyclophosphamide, doxorubicin, vincristine, and prednisone) or R-CVP (rituximab, cyclophosphamide, vincristine, and prednisone), may be preferred, based on two retrospective reviews and a phase II study.[7,19-21][Level of evidence C3]
In a phase II trial of 39 patients with previously untreated and relapsed NLPHL, most of whom had advanced-stage disease, treatment with rituximab yielded a 100% response rate. With a median follow-up of 9.8 years, the median PFS was 3.0 years for patients who received rituximab induction only and 5.6 years for patients who received rituximab induction plus rituximab maintenance.[22][Level of evidence C2] With induction only, 9 of 23 patients had disease relapse with an aggressive B-cell lymphoma.
Despite a usually favorable prognosis, there is a tendency for histological transformation of NLPHL to diffuse large B-cell lymphoma or T-cell–rich large B-cell lymphoma in approximately 10% of patients by 10 years.[6,22,23] This propensity of NLPHL to transform to aggressive B-cell lymphoma underscores the importance of long-term follow-up and rebiopsy at relapse.[22,24]
With a median follow-up of 7 to 8 years, more patients died of treatment-related toxic effects (acute and long-term) than of recurrent HL. Limitation of radiation dose and fields and avoidance of leukemogenic chemotherapeutic agents, along with watchful waiting policies, should be investigated for these subgroups.[5,17,25]
The treatment approach for relapsing disease is similar to that for recurrent follicular lymphoma. Based on age and performance status, some patients receive sequential therapies and watchful waiting, and some patients receive aggressive salvage chemoimmunotherapy (like R-ICE [rituximab, ifosfamide, carboplatin, and etoposide]) followed by stem cell transplant.[7,26,27]
Use our advanced clinical trial search to find NCI-supported cancer clinical trials that are now enrolling patients. The search can be narrowed by location of the trial, type of treatment, name of the drug, and other criteria. General information about clinical trials is also available.
Hodgkin lymphoma (HL) affects primarily young women, some of whom may be pregnant. When treating a pregnant woman, an oncologist will provide therapy that minimizes risk to the fetus. Treatment choice must be individualized, taking the following into consideration:
To avoid exposing a pregnant woman to ionizing radiation, magnetic resonance imaging is the preferred method for staging evaluation.[1] The presenting stage, clinical behavior, prognosis, and histological subtypes of HL in pregnant women do not differ from those in nonpregnant women during their childbearing years.[2] For more information, see the Stage Information for HL section.
Treatment options for HL during pregnancy include:
In one study, the 20-year survival rate of pregnant women with HL did not differ from the 20-year survival rate of nonpregnant women who were matched for similar stage of disease, age at diagnosis, and calendar year of treatment.[3]
The long-term effects on progeny after chemotherapy in utero are unknown, although evidence seems promising.[3-7]
Based on anecdotal series, there is no evidence that a pregnancy after completion of therapy increases the relapse rate for patients in remission.[8,9]
HL that is diagnosed in the first trimester of pregnancy does not constitute an absolute indication for therapeutic abortion. Treatment options for each patient must take into account disease stage, rapidity of growth of the lymphoma, and the patient's wishes.[10]
If the HL presents in early stage above the diaphragm and is growing slowly, patients can be observed carefully, with plans to induce delivery early and proceed with definitive therapy.[11]
Alternatively, these patients can receive radiation therapy with proper shielding.[12-15] Investigators at the MD Anderson Cancer Center reported no congenital abnormalities in 16 babies delivered after the mothers had received supradiaphragmatic radiation while the uterus was shielded with five half-value layers of lead.[16] Because of theoretical risks of the fetus developing future malignancies from even minimal scattered radiation doses outside the radiation field, postponing radiation therapy—if possible, until after delivery—should be considered.[17]
Evidence (chemotherapy during the first trimester):
In the second half of pregnancy, patients can be observed carefully, and therapy can be postponed until induction of delivery at 32 to 36 weeks.[6,7,18]
As an alternative, a short course of radiation therapy can be used before delivery in cases of respiratory compromise caused by a rapidly enlarging mediastinal mass.
If chemotherapy is mandatory before delivery—such as for patients with symptomatic advanced-stage disease—vinblastine alone, given intravenously at 6 mg/m² every 2 weeks until induction of delivery, may be considered because it has not been associated with fetal abnormalities in the second half of pregnancy.[6,7] Combination chemotherapy with ABVD appears to be safe in the second half of pregnancy.[5] If chemotherapy is required after the first trimester, many clinicians prefer the combination of drugs over single-agent drugs or radiation therapy. Steroids are employed both for their antitumor effect and for hastening fetal pulmonary maturity.
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.
General Information About Hodgkin Lymphoma (HL)
Added text to state that in a cohort of 1,964 female 5-year HL survivors, doxorubicin increased breast cancer risk independent of age at first treatment or prior chest radiation therapy (cited Neppelenbroek et al. as reference 49). Survivors who received more than 200 mg/m2 of doxorubicin had a 1.5-fold increased risk versus survivors who did not receive doxorubicin.
Treatment of Nodular Lymphocyte–Predominant HL (NLPHL)
Added text to state that an international prognostic score identified age 45 years or older, stage III or IV disease, hemoglobin less than 10.5 g/dL, and splenic involvement as poor prognostic factors for NLPHL (cited Binkley et al. as reference 8).
This summary is written and maintained by the PDQ Adult 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.
This PDQ cancer information summary for health professionals provides comprehensive, peer-reviewed, evidence-based information about the treatment of adult Hodgkin lymphoma. It is intended as a resource to inform and assist clinicians in the care of their patients. It does not provide formal guidelines or recommendations for making health care decisions.
This summary is reviewed regularly and updated as necessary by the PDQ Adult Treatment Editorial Board, which is editorially independent of the National Cancer Institute (NCI). The summary reflects an independent review of the literature and does not represent a policy statement of NCI or the National Institutes of Health (NIH).
Board members review recently published articles each month to determine whether an article should:
Changes to the summaries are made through a consensus process in which Board members evaluate the strength of the evidence in the published articles and determine how the article should be included in the summary.
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The preferred citation for this PDQ summary is:
PDQ® Adult Treatment Editorial Board. PDQ Hodgkin Lymphoma Treatment. Bethesda, MD: National Cancer Institute. Updated <MM/DD/YYYY>. Available at: https://www.cancer.gov/types/lymphoma/hp/adult-hodgkin-treatment-pdq. Accessed <MM/DD/YYYY>. [PMID: 26389473]
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