Fig. 3
Microscopic findings of the resected specimen. The tumor composed of poorly differentiated epithelial cells with vesicular nuclei, prominent nucleoli and intense lymphocytic infiltration. (a, HE, × 200), (b, HE, × 400). Immunohistochemical staining for hepatocyte is negative (c, HE, × 200). Immunohistochemical staining for CK18 is positive (d, HE, × 200). Immunohistochemical staining for Arg and EBER is negative (e, HE, × 200), (f, HE, × 200)