Low Grade Endometrioid Stromal Sarcoma

**Semantic type:** Neoplastic Process

**Definition:** An infiltrating mesenchymal neoplasm arising from the uterine corpus, cervix, vagina, ovary, and extremely rarely from the peritoneum. It is characterized by the presence of oval to spindle-shape cells that resemble the cells of the endometrial stroma, without evidence of significant atypia and pleomorphism. Numerous small vessels are also present. It is usually characterized by indolent growth and late recurrences.

**Synonyms:** - Endolymphatic Stromal Myosis - Endolymphatic stromal myosis - Low-Grade Endometrioid Stromal Sarcoma