A Case of Retrograde Intussusception Caused by a Pedunculated Adenoma of the Sigmoid Colon

Yoshiko Bamba, Tatsuya Nakano, Hiroaki Tomimatsu and Shingo Kameoka*

Department of Surgery, Chichibu Municipal Hospital
Department of Surgery II, Tokyo Women's Medical University, School of Medicine*

We report a case of retrograde intussusception caused by a pedunculated adenoma of the sigmoid colon. A 72-year-old man admitted with left lower abdominal pain was found to have a hard elastic mass about 7 cm palpable in the left lower abdomen. Abdominal X-ray showed gas throughout most of the intestine and the colon to the splenic flexure. The target sign was detected in the descending colon on CT scan. The oral side was continuous with the distended intestine, and on the anal side the mesentery was inserted into the lumen of the colon. Enema detected beak-like stenosis, necessitating surgery under a diagnosis of retrograde intussusception. The sigmoid colon was inserted in the oral side and the apex was palpated in the descending colon. Sigmoidectomy revealed a tumor 35×21×16 mm pedunculated found in pathological examination to be an adenoma.

Key words
retrograde intussusception, adult intussusception, adenoma in sigmoid colon

Reprint requests
Yoshiko Bamba Department of Surgery II, Tokyo Women's Medical University, School of Medicine
8-1 Kawada-cho, Shinjuku-ku, 162-8666 JAPAN

Accepted
October 19, 2005

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