An unusual presentation of primary sclerosing cholangitis

Figure 3 ERCP. A: Initial cholangiogram showing dilated extrahepatic ducts consistent with diagnosis of type IV choledochal cysts (arrowhead), and 7 cm common duct stricture (arrow); B: Final balloon occlusion cholangiogram performed one year after stenting showing resolution of the common duct stricture and cystic biliary dilation. The intrahepatic ducts are diffusely irregular.