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Fig. 1. —Thick-slab MR cholangiopancreatogram of 72-year-old woman with primary sclerosing cholangitis shows focal narrowing of anterior right hepatic duct (arrow) with proximal dilatation compatible with stricture. In addition, nonvisualization of common hepatic duct (arrowhead), which should normally be well visualized, with intrahepatic bile ductal dilatation, also implies stricture.