Malignant Transformation of Endometriosis: A Rare Case of Extrauterine Endometrial Stromal Sarcoma.
Endometrial stromal sarcoma (ESS) is an extremely uncommon uterine malignancy, and commonly arises from preexisting endometriosis. On rare occasions, ESS arises from extrauterine tissues and is known as extra-uterine ESS. …