Double common bile duct with ectopic drainage of the left lobe into the stomach. Case report and review of the literature.

A peculiar abnormal biliary tract consisting in a double common bile duct, one with a normal drainage into the duodenum and the other providing from the left lobe with an ectopic drainage into the stomach is described. For the first time, this anomaly was discovered by endoscopic retrograde cholangiopancreatography (E.R.C.P.). In the literature, only twelve other cases of abnormal drainage into the stomach are described. This could be related to a random subdivision of the hepatic diverticulum during the first weeks of embryogenesis.