Laparoscopic cholecystectomy in a patient with a duplicated cystic duct.

Cystic duct duplication with a single gallbladder is one of the most uncommon abnormalities of the biliary tract, with fewer than 15 instances published. The authors describe a 49-year-old patient undergoing a laparoscopic cholecystectomy in whom a second cystic duct was found, initially misdiagnosed as the biliary tract. The cholecystectomy was performed successfully with the aid of intraoperative cholangiography. It is the first time a duplicated cystic duct has been treated successfully using a laparoscopic approach.