A Case of Colovesicocutaneous Fistula due to Diverticulitis Requiring Differentiation from Colon Cancer

Abstract

A 70-year-old man presented to our hospital with abdominal fullness. Severe stenosis of the sigmoid colon and a dilated colon were confirmed using abdominal computed tomography. The cause of the obstruction was unclear. Transverse colostomy was performed. Three months after the surgery, a colovesicocutaneous fistula formed. We considered colon cancer ; however, colonoscopy in our hospital showed several diverticula in the sigmoid colon and no malignancy. We diagnosed a colovesicocutaneous fistula secondary to sigmoid colon diverticulitis and performed high anterior resection and partial cystectomy with fistulotomy. The pathological diagnosis was diverticulosis, and there was no malignancy. We encountered a case of colovesicocutaneous fistula due to diverticulosis that required differentiation from cancer.