A variant of an accessory common bile duct.

While variations of the common bile duct are relatively common, true duplication of the common bile duct is very rare. Such deviation from normal anatomy, if unrecognized, may cause problems during surgical intervention. Here we present a case of a unique variant of an accessory bile duct which arises from the confluence of the right and left hepatic ducts and runs down to join the pancreatic duct to form a long, common channel before opening into the papilla with the main duct.