Fig. 1

Contrast-enhanced computed tomography (CT) and endoscopic retrograde cholangiopancreatography (ERCP). a CT shows dilation of the intrahepatic and extrahepatic bile ducts, wall thickening of the common bile duct, and atrophy of the left liver lobe. b ERCP demonstrates a defect in the left intrahepatic and common bile ducts. Furthermore, a mass in the common bile duct is indicated. c Intraoperative findings showed atrophy of the left lobe. d Left hepatectomy, caudate lobectomy, and extrahepatic bile duct resection were performed