Uterine Corpus Dissecting Leiomyoma

**Semantic type:** Neoplastic Process

**Definition:** A rare morphologic variant of uterine corpus leiomyoma. Macroscopically, it is characterized by large, fungating, and multinodular neoplasm masses arising from the uterine corpus, and extending into the broad ligament or the peritoneal cavity. Microscopically, it shows neoplastic smooth muscle cells infiltrating the myometrium. The neoplastic cells are arranged in a micronodular pattern. Hydropic changes and increased vascularity are also present.

**Synonyms:** - Cotyledonoid Dissecting Leiomyoma - Sternberg Tumor