The most common histologic types of uterine sarcomas are:

• Carcinosarcomas (mixed mesodermal sarcomas [40%–50%]).
• Leiomyosarcomas (30%).
• Endometrial stromal sarcomas (15%).

The uterine neoplasm classification of the International Society of Gynecologic Pathologists and the World Health Organization uses the term carcinosarcomas for all primary uterine neoplasms containing malignant elements of both epithelial and stromal light microscopic appearances, regardless of whether malignant heterologous elements are present.[1]

References

1. Silverberg SG, Major FJ, Blessing JA, et al.: Carcinosarcoma (malignant mixed mesodermal tumor) of the uterus. A Gynecologic Oncology Group pathologic study of 203 cases. Int J Gynecol Pathol 9 (1): 1-19, 1990.  [PUBMED Abstract]
   
   

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