Fig. 3

Macroscopic and microscopic findings of the metastatic tumor in the ascending colon. A Macroscopic findings of the metastatic tumor. Colonic metastasis (Φ20 mm, red arrow) was mainly observed within the subserosal and muscularis layers in the ascending colon, along with a contiguous retroperitoneal hematoma. B Microscopic findings revealed a moderately differentiated type of HCC. C The Elastica-van Gieson stain showed vascular invasion of the metastatic tumor. D Microscopic findings of primary HCC