Abstract
Cholecystocolonic fistula is a rare internal biliary-enteric fistula with a variable presentation and has been still ill-defined. We report an asymptomatic patient with a cholecystocolonic fistula presented with a colon polyp and confirmed by histopathological examination.
A 66-year-old man underwent high anterior resection with a diverting loop transverse colostomy for large bowel obstruction due to sigmoid colon cancer. Recovery was uneventful and closure of the stoma was planned. Preoperative colonoscopy showed a subpedunculated lesion 20 mm in diameter at the hepatic flexure of the transverse colon. Partial resection of the transverse colon was also planned because of a high possibility of coexsisting malignancy. The operation revealed dense adhesions between the liver and the lesion of the colon and lysis of the adhesions resulted in bile leakage from a tract. It was confirmed to be the cystic duct draining into the common bile duct by intraoperative fluoroscopy using contrast, which was ligated. Histopathological examination of the specimen demonstrated cholecystocolonic fistula.
