A Case of Sigmoid Colon Liposarcoma Associated with Intussusception

Abstract

An 82-year-old woman was admitted with a history of lower abdominal discomfort, and was found to have a hen egg-sized tumor in the rectum. Abdominal CT showed intussusception of the sigmoid colon and a round shaped tumor in the rectum. Fiberoptic colonoscopy revealed a hen egg-sized elastic-hard, smooth-surfaced tumor projecting into the colonic lumen. Sigmoidectomy with D2 lymph node dissection was performed under a preoperative diagnosis of sigmoid colon submucosal tumor associated with intussusception. Histopathological examination of the resected specimen revealed a well-differentiated liposarcoma of the colon. The postoperative course was favorable and the patient was discharged on postoperative day 28. Liposarcoma arising from the large intestine is rather rare, and we report the case herein, with a review of the relevant literature.