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Bile duct adenoma in a 49-year-old man. Axial contrast-enhanced images (a, b) of upper abdomen show rim enhancing subcapsular lesion in the arterial phase (a, arrow) and central enhancement of the lesion in the venous phase (b, arrow) in the right lobe of the liver. Resected liver segment (c) shows solitary, subcapsular lesion in right lobe of the liver (arrow). The lesion was proven to be a bile duct adenoma by histopathological examination (not shown).
