Fig. 1

Histological analysis. A (group L): Stainable material was present in liver portal area, both inside main (a) and smaller portal vessels (open arrowhead). Biliary canal was indicated (b). Inside the tumor, some stainable material was present at the tumor periphery near the capsule (c) as clusters of irregularly sized stainable material-containing vacuoles and in the vicinity of larger tumor stromal trabeculae (s) identified due to their lower cellular content and lighter eosinophilic stain. B (group M): Cluster of microspheres filling the lumen of the main arteries (blue arrow) and isolated microspheres in small capillaries inside the tumor (black arrowhead)