Clinical study of extrahepatic biliary adenoma

Figure 1 Adenoma of the bile duct that mimic biliary stone disease on magnetic resonance cholangiopancreatography. A: Gallstones, the dilatation of intra- and extra-hepatic bile duct and filling defect at the end of common bile duct; B: Multiple filling defects of hilar bile duct with dilatation of intrahepatic bile duct. The arrow symbols point to the adenomas.