Couinaud Type A communicating accessory bile duct: report of a case.

An aberrant bile duct from the right hepatic duct to the common hepatic duct (Couinaud Type A) is an uncommon accessory bile duct that one must be aware of when performing complex hepatobiliary procedures such as right liver resection for living-related donation. Detailed preoperative imaging and careful dissection with anticipation of anomalous anatomy are of the utmost importance for the safe conduct of hepatic surgery.