A Case of Retrograde Intussusception Due to a Polypiform Cancer of Sigmoid Colon in Adult

Abstract

This paper describes our recent expertence with a case of a retrograde intussusception due to a sigmoid polypiform cancer in the light of the related literature. The patient was a 66-year-old man who was admitted to our hospital due to lower abdominal pain. Abdominal X-ray showed a ileus shadow of large intestine. X-ray computed tomography showed the intestine and the mesenterium-like composition in transverse and descending colon. Therefore we diagnosed a intussusception of colon and mechanical ileus, and laparotomy was immediately performed. The sigmoid colon invaginated into the descending and transverse colon retrogradely, we could not rule out the existense of malignant tumor, so the colon, from the left transverse colon to thm upper half of the sigmoid colon, was resected with regional lymphnodes. The resected specimen showed a small polyp (11×10mm) at the top of the intussusceptum. Microscopic examination clarified that the polyp was a well differenciated adenocarcinoma within the mucosa and lymphnode metastasis was negative.