PMC3290014_01
Computed tomography revealed an enhanced mass at the proximal bile duct. Arrows indicate the mass lesion.
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F1
Computed tomography showed an enhanced mass with an unclear edge at the proximal bile duct, facing the right hepatic artery (fig. 1).
Magnetic resonance cholangiopancreatography showed a stricture of the common hepatic duct (arrow) and dilatation of the bilateral intrahepatic ducts.
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F2
Magnetic resonance cholangiopancreatography revealed stenosis of the common hepatic duct and bilateral intrahepatic duct dilatation (fig. 2).
The histopathological findings revealed that the tumor consisted of mainly spindle-shaped cells (a; H&E, x200). Giant cells were also recognized in some areas (b; H&E, x100). The tumor cells had positive immunoreactivity for cytokeratin 7 (c; x200) and vimentin (d; x100).
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F3
Histopathologically, the tumor consisted of mainly spindle-shaped and giant cells, and moderately differentiated tubular adenocarcinoma cells were also recognized in some areas (fig. 3a, b). Immunohistochemical study revealed that the tumor cells were positive for cytokeratin 7 and vimentin (fig. 3c, d).