Abstract
We report a case of multiple primary carcinomas of the rectum and sigmoid colon with aberrant pancreas in the mesentery of the small intestine. A 60-year-old man was admitted to our hospital due to colonic obstruction. Emergency computed tomography (CT) and colonoscopy showed evidence of tumors in the rectum and sigmoid colon. A colostomy was performed as a temporary measure. After the patient was discharged from the hospital to prepare for the curative operation, he was again hospitalized due to adhesive intestinal obstruction. A second operation showed an ileus due to a band at the jejunum (approximately 40 cm distal to the ligament of Treitz) and a firm nodule(25 mm) in the mesentery nearby. The nodule was highly suggestive of mesenteric dissemination of the carcinomas ; however, aberrant pancreas was confirmed in a specimen obtained intraoperatively. Detachment of the adhesive intestine and low anterior resection were performed. The nodule was subsequently diagnosed as aberrant pancreas (Heinrich type I).
