Peritoneal Gastrointestinal Stromal Tumor

**Semantic type:** Neoplastic Process

**Definition:** A gastrointestinal stromal tumor that arises from the peritoneum. This is an extragastrointestinal tumor, meaning that it does not arise directly from the gastrointestinal tract.

**Synonyms:** - Peritoneal EGIST - Peritoneal Extragastrointestinal Stromal Tumor - Peritoneal Gastrointestinal Stromal Tumor (GIST)