Fig. 3

Pathological findings. Hematoxylin and eosin staining. A Primary tumor composed of viable cancer cells (V) with necrosis (N). B At a higher magnification, the infiltration of inflammatory cells and necrosis of cancer cells were observed. C Portal vein tumor thrombus (arrows). The majority of the thrombotic cancer cells are necrotic. D At a higher magnification, the residual cancer cells were observed (arrows)