small intestinal sarcoma (MONDO_0003361) is a malignant soft tissue neoplasm that arises from the small intestine. Representative examples include leiomyosarcoma, angiosarcoma, and Kaposi sarcoma. Also known as: sarcoma of small bowel, sarcoma of small intestine, sarcoma of the small bowel, sarcoma of the small intestine, sarcoma, small intestinal, small bowel sarcoma, small intestine sarcoma.