Abstract
A 63-year-old woman was admitted to the hospital because of massive anal bleeding. Emergency colonoscopy revealed pulsating bleeding from a polyp about 1cm in size in the sigmoid colon. Clliping of the polyp was carried out and the bleeding stopped. Endoscopic polypectomy was performed, but the pathological findings of the specimen showed moderately differentiated adenocarcinoma invaded the submucosa deeply. We thought that radical operation should be done. She underwent a sigmoidectomy. Histological findings demonstrated no residual tumor, but lymph node metastasis was showed. Early colorectal cancer presented with massive anal bleddding is rare. This rare case is reported together with a review of the literature.