Fig. 5From: Micro-hepatocellular carcinoma with bile duct tumor thrombus mimicking intrahepatic intraductal papillary neoplasm of the bile duct: a case reportMicroscopic findings. a Tumor filled the bile duct, proliferating in a nearly cord-like ductal structure. b Tumor grew in a nearly cord-like tubular structure and showed carcinoma-equivalent atypia with finely granular, highly acidophilic, abundant cytoplasm, and irregular round nuclei with agglutinated chromatin, which were consistent with moderately differentiated HCC. c Immunostaining also showed that the tumor cells were hepatocyte-positive, indicating hepatocellular carcinomaBack to article page