Abstract
A 78-year-old woman who was seen at our hospital because of lower abdominal pain and anal bleeding at defecations was diagnosed as having sigmoid colon cancer following colonoscopy. She underwent sigmoidectomy. Histopathological studies revealed that micropapillary carcinoma component showing clear-cut micropapillary morphology accounted for about 80% of the whole tumor and mildly differentiated adenocarcinoma component accounted for about remaining 20% of the tumor. Lymphatic invasion of minor degree was demonstrated. Micropapillary carcinoma of the colon and rectum has been reported to have the same poor prognosis as that of carcinoma derived from other organs. It occurs in a lowest frequency and so we present the case together with a review of the literature.
