A Case of Acute Peritonitis Caused by a Ruptured Abscess associated with a Mesenteric Desmoid Tumor

Abstract

A 45-year-old woman was admitted to our hospital with a fever and epigastralgia. She had peritoneal irritation and the blood test showed increased WBC and CRP. We suspected this case to be a ruptured infectious gastrointestinal stromal tumor based on the enhanced CT scan imaging, and she underwent an emergency operation. A tumor, 9.2 centimeters in diameter, was found in the mesentery of the transverse colon and pus oozed out from a hole on the tumor. Tumorectomy including the resection of a part of the horizontal portion of duodenum, intraperitoneal drainage and an ileostomy were performed. Pathological findings revealed a desmoid tumor. We experienced a relatively rare case of acute peritonitis caused by a ruptured abscess of a mesenteric desmoid tumor. Because desmoid tumors tend to infiltrate locally and recur frequently after resection, it is important to achieve as complete a resection as possible.