Spontaneous cholecysto-cutaneous fistula mimicking postoperative scar sinus.

Although biliary fistulae are common, spontaneous biliary fistulae are very rare. Even more rare are spontaneous cholecysto-cutaneous fistulae. A case of spontaneous cholecysto-cutaneous fistula presenting through an abdominal scar mimicking a postoperative scar sinus is presented, the literature is reviewed and the reasons for occurrence of such a fistula are discussed.