We report a case of cholecystolithiasis with a rare biliary anomaly. A 68-year-old woman complaining of right upper abdominal pain was admitted to the hospital with a diagnosis of cholecystoldithiasis. ERC revealed a bile duct anomaly.
The cystic duct seemed to join the right hepatic duct. Considered probable unnatural run of the bile duct, a laparotomy was performed on June 23, 1999. Intraoperative cholangiography demonstrated that the cystic duct joined an accessory bile duct connecting the right hepatic duct and common hepatic duct.
To the best of information, this anomaly in our case has been reported in four cases before, but is not included in any published classification system advocated by Hisatsugu or Saito. It is important to demonstrate the biliary anatomy by preoperative biliary examinations to prevent intraoperative bile duct injury.