Sigmoid Lipoma as an Exceptional Cause of Intussusception and Bowel Obstruction in Adults: A Case Report and Review of Literature

This case report describes a 60-year-old man who presented with acute abdominal pain with marked abdominal distention and red rectal bleeding. A contrast-enhanced abdominal CT scan was performed, which revealed a recto-sigmoid intussusception on lipoma, causing mechanical intestinal obstruction. The patient underwent a partial reduction of the intussusception with partial sigmoid resection and end colostomy. And histologic evaluation confirmed the diagnosis of colonic lipoma. Intussusception of the colon is uncommon in adults and is often associated with malignancy, but other nonmalignant causes such as lipoma may also present with obstructive symptoms, abdominal pain, and rectal bleeding. However, it should be a differential diagnosis of such situations.