Preoperative diagnosis of double gallbladder: a case report.

Gallbladder duplication is a rare congenital anomaly of the biliary system. There are no specific symptoms for diagnosis. We present the case of a double gallbladder, which was diagnosed preoperatively. A laparoscopic cholecystectomy was performed successfully. We discuss that the preoperative diagnosis of this anomaly is especially important to prevent possible surgical complications and repeated laparotomies.