Figure 5.

Photomicrographs of vessel staining in three cases of metastatic breast cancer in liver. Images on the left are immunostained histological sections. On the right are the same sections visualized in black and white to highlight the CD31-stained vasculature. Panels A–F are from normal liver and panels G–L are from matched tumors. At low power the normal sections show a fine meshwork of capillaries. In contrast, tumors exhibit vessels that are generally larger in size and fewer in number.