Fig. 4From: Intrahepatic cholangiocarcinoma with a tumor thrombus extending from the inferior vena cava to the right atrium: a case reportImmunohistochemical findings. Immunohistochemical analysis revealed that tumor cells were positive for cytokeratin-7 (a), cytokeratin-19 (b), and epithelial membrane antigen (c), but negative for arginase-1 (d), glypican-3 (e), and hepatocyte (f)Back to article page