A Case of a Transverse Mesentery Desmoid Tumor Causing Gastrointestinal Bleeding without Past Abdominal Surgery

Abstract

A 39-year-old woman presented to our hospital with abdominal pain as the chief complaint. She had no history of abdominal surgery. A computed tomography scan revealed a mass lesion and suspected bleeding into the intestinal wall of the transverse colon, and emergency laparotomy was performed. Intraoperative findings revealed a solid mass in the splenic flexure and strong adhesions on the dorsal side of the stomach, tail of the pancreas, and hilum of the spleen. Partial resection of the stomach, tail of the pancreas, combined splenectomy, and partial resection of the colon were performed. Histopathological findings showed proliferation of spindle-shaped fibroblasts, and the image was diagnosed as a desmoid tumor. Hemorrhagic foci were observed in the tumor. Desmoid tumors that occur in patients with no history of abdominal surgery and are diagnosed by bleeding are rare. We report this unusual case together with a review of the available literature.