Internal hernia associated with colostomy after laparoscopic abdominoperineal resection.

We herein describe a case with an internal hernia that developed after laparoscopic abdominoperineal resection for rectal cancer. The small intestine passed through the space between the sigmoid colon loop of the stoma and the abdominal wall. Internal hernias associated with colostomy are rare; however, the condition is an important complication, because it causes ischemia in both the herniated intestine and the sigmoid colon pulled through the abdominal wall as a stoma.