A large colon polyp that detached spontaneously during the preoperative period

Abstract

A 64-year-old male with abdominal discomfort was referred to our department since a 6-cm tumor was found in the transverse colon on barium enema. As his diabetes mellitus was poorly controlled, he was admitted two weeks before surgery. As part of the preoperative preparation, he was given Niflec 2,000 ml orally from noon the day before surgery. Though tumor invagination was identified in the transverse colon on the computed tomography done four days before surgery, no tumor was detected during the surgery. Intraoperative colonoscopy identified an ulcerative lesion at the site where the tumor had been detected preoperatively. He underwent a partial resection of the colon which included the ulcerative lesion along with a D2 dissection. Pedunculated giant colon polyps can spontaneously detach. The preoperative bowel preparation could be responsible for the dislodgement.