A Case of Retrograde Intussusception due to a Polyp of the Sigmoid Colon

Manabu Takano, Akihiro Yamaguchi, Masatoshi Isogai and Yuji Kaneoka

Department of Surgery, Ogaki Municipal Hospital

We describe a case of retrograde intussusception due to a sigmoid colonic polyp. A 62-year-old man admitted with lower abdominal pain had a tumor palpated in the left lower abdomen. Ultrasonography showed a double intestinal structure. Barium enema disclosed a complete beak-like obstruction of the sigmoid colon. Following the diagnosis of mechanical obstruction, we conducted a laparotomy and found the sigmoid colon invaginated retrogradely into the oral side of the colon. The resected specimen revealed a pedunculated polyp in the mucosa, and microscopic examination clarified it to be tubulovillous adenoma. Although some cases of intussusception require ultrasonography and computed tomograpy, barium enema is useful in diagnosing retrograde intussusception.

Key words
retrograde intussusception, adult, colon polyp

Reprint requests
Manabu Takano Department of Surgery, Daido Hospital
9 Hakusui-cho, Minami-ku, Nagoya, 457-8511 JAPAN

Accepted
September 19, 2001

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