Colonic Lipoma With Gastrointestinal Bleeding and Intussusception

A 59-year-old woman presented with a history of intermittent abdominal discomfort associated with bloody bowel movements. Physical examination was notable for mild suprapubic tenderness. A colonoscopy revealed a submucosal tumor with a necrotic tip, which was nearly obstructing the colonic lumen in the sigmoid (Figure 1). An abdominal/pelvic computed tomography (CT) showed a colonic mass with associated intussusception of the mesentery at the level of the mid-sigmoid colon (Figure 2). The perirectal fat was mildly edematous and there was slight presacral soft tissue thickening. On laparoscopy, the patient had a tubular mass at the mid-sigmoid colon that was a lead point for intussusception. A partial colectomy with proximal sigmoid colon-