Duplicate gallbladder during laparoscopic cholecystectomy.

Congenital duplication of a gallbladder is a rare anatomic malformation. This malformation is rarely diagnosed preoperatively and usually is discovered during the course of cholecystectomy. Whether discovered preoperatively or intraoperatively, biliary anatomy should be assessed, then cholecystectomy should be performed on both gallbladders. Reported is a case of a duplicate gallbladder managed by performance of laparoscopic cholecystectomy.