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Macroscopic and histologic examination of the tumor resected in 2002. Macroscopic examination revealed a, b a papillary lesion (arrowheads) in the posterior segmental bile duct draining into the common hepatic duct. Arrow indicates the portal vein. Histologic examination revealed a well-differentiated adenocarcinoma (c) that formed an intrabiliary papillary tumor and invaded the liver at the posterior segmental bile duct to the right hepatic duct
