Idiopathic Sigmoid Intussusception Prolapse per Anus

Sigmoidal intussusception protrusion through the anus is extremely rare and has only been reported a few times. The majority of cases of prolapsed sigmoid intussusception in adults have an underlying bowel pathology such as carcinoma, polyps, or benign neoplasms, which are usually discovered intra-operatively. Our case is a 25-year old male patient, previously healthy, with no history of constipation or straining, who presented with a painless prolapsed mass out of the anus. It is very unusual for a young healthy male to present suddenly with such a complaint. After failed attempts to reduce the prolapsed segment under general anesthesia, laparotomy was performed and the prolapsed mass was determined to be an intussuscepted sigmoid. Hartmann procedure was performed. 9 cm of the sigmoid was resected. Findings were consistent with a healthy but edematous prolapsed sigmoid colon.