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A 62-year-old man with recurrent pyogenic cholangitis and resultant bile duct stricture.
A. Sonogram of the right hepatic lobe reveals substantially dilated posterior segmental bile ducts. There is no visible mass or stone.
B, C. Computed tomogram (B) and MR cholangiogram (C) depict dilated posterior segmental bile ducts with no identifiable mass or stone.
