A case of multiple carcinoid tumors of the rectum associated with transverse colon cancer

Abstract

We report an extremely rare case of multiple carcinoid tumors of the rectum associated with transverse colon cancer.
Case report : A 54 years-old male was pointed out positive occult blood of stool in a regular medical check up. The patient underwent colonoscopic examination which revealed a surface type tumor in the transverse colon and three elevated type tumors in the rectum, and was referred to our department of surgery. Endoscopic mucosal resections to all lesions were performed. The pathological finding disclosed a well differentiated adenocarcinoma in the transverse colon and two carcinoid tumors in the rectum.
Carcinoid tumor generally occurs as a single lesion in the rectum. Cases of multiple rectal carcinoid tumors have been rarely reported in Japan. Since the rate of multiple carcinoid tumor accompanied with other neoplasms including malignant tumor in the gastrointestinal tract is reported to be high, in the case of multiple colon carcinoid tumors, it was thought that further reference of the whole body should be performed, and also cautious follow-up of these cases is mandatory.