# Adenocarcinoma-Induced Sigmoid Colon Intussusception and Postoperative Parastomal Evisceration in an Elderly Patient: A Case Report and Literature Review

## TL;DR

An elderly man with colon cancer developed a rare condition called intussusception and later experienced a post-surgery complication called parastomal evisceration.

## Contribution

This case report highlights a rare presentation of adenocarcinoma-induced sigmoid colon intussusception and its postoperative complication.

## Key findings

- CT imaging showed a 'target sign' indicating intussusception caused by a sigmoid colon adenocarcinoma.
- The patient experienced parastomal evisceration on the first postoperative day after emergency colostomy.
- The tumor was diagnosed as well-differentiated adenocarcinoma with pT3N0 classification.

## Abstract

Intussusception in adults is less frequent than in children, and it is less commonly seen in the colon than in the intestines. This may be explained by the fixation of the colon to the retroperitoneum. We herein describe a case of sigmoid colon intussusception caused by a sigmoid colon adenocarcinoma. An 81-year-old man presented with abdominal pain and signs and symptoms of gastrointestinal obstruction. CT revealed a “target sign” with a mass in the sigmoid colon. We diagnosed the patient with colonic obstruction secondary to intussusception of the sigmoid colon and performed an emergency transverse colostomy. On the first postoperative day, the patient had a parastomal evisceration. Oncologic resection of the sigmoid colon without reduction of the intussusception was performed. The tumor was pathologically diagnosed as well-differentiated adenocarcinoma and classified as pT3N0. The patient was discharged on the ninth postoperative day with an uneventful postoperative course. The surveillance was validated for this patient.