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Approximately four months prior to admission, this 68-year-old male began having "sharp, shooting pains" in the lower abdomen. A barium enema at that time was reported as normal. Two months later, the barium study was repeated because of persistent diarrhea and On admission a CT scan showed a filling defect mass in the transverse colon. The patient refused to undergo an exploratory a laparotomyand declined further treatment. During the week prior to this admission, the patient had recurrent diarrhea, cramping Six months later he returned with severe abdominal pain, and marked rectal bleedinga colectomy was performed. He  The segment of colon contained numerous polyps and an annular tumor which was hospitalized and required 2500 ml 6.7 cm in diameter. Endoscopic examination of blood to return his hematocrit to normal. A colectomy was done from the hepatic flexure to the rectosigmoidascending colon revealed two more polyps which were removed.