A Case of Sigmoid Colon Cancer Accompanied by an Inverted Cecum Successfully Treated with Laparoscopic Surgery

Abstract

A 40-year-old man was referred to our department for surgery as histopathological results following endoscopic mucosal resection performed for early sigmoid colon cancer indicated the need for additional resection. A contrast study of the lower gastrointestinal tract confirmed an inverted cecum. The cecum and appendix were located in the right upper abdomen at the height of superior anterior iliac spine, the blind end of the cecum was directed toward the head, and most of the right colon had moved downward as a whole into the pelvic cavity. An abdominal contrast-enhanced CT examination revealed no intraperitoneal distant metastasis, lymph node enlargement, or SMV rotation sign. Therefore, laparoscopic sigmoidectomy was performed in the usual manner. We hereby report a case of inverted cecum, an extremely rare subtype of intestinal malrotation, which was detected preoperatively, enabling us to perform surgery safely under laparoscopic guidance.