Fig. 2

Endoscopic retrograde cholangiopancreatography revealed mild dilatation of the intra- and extrahepatic bile duct and an irregular filling defect in the middle portion of the common bile duct (arrow)
Endoscopic retrograde cholangiopancreatography revealed mild dilatation of the intra- and extrahepatic bile duct and an irregular filling defect in the middle portion of the common bile duct (arrow)