Endometrioid Stromal Sarcoma

**Semantic type:** Neoplastic Process

**Definition:** A malignant mesenchymal neoplasm that affects the uterine corpus and rarely the ovaries, cervix, vagina, and peritoneum. In the uterine corpus it is classified as low-grade or high-grade endometrial stromal sarcoma. In the remainder of the anatomic sites, it is classified as low-grade endometrioid stromal sarcoma.

**Synonyms:** - ESS - ESS - Endometrial Stromal Sarcoma - Endometrial stromal sarcoma - STROMAL SARCOMA, ENDOMETRIAL, MALIGNANT - Sarcoma, Endometrial Stromal