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Fig. 4C —65-year-old woman with hepatic steatosis and
cholangiocarcinoma. Peritumoral sparing of fatty infiltration surrounds
cholangiocarcinoma. Contrast-enhanced hepatic arterial phase CT scan shows
tumor encasing right anterior segmental portal vein (arrow). Rimlike
and wedge-shaped parenchymal enhancement (arrowheads) surrounds
tumor. Right hepatectomy was performed; pathologic diagnosis of mass was
cholangiocarcinoma.