Coexpression of CD31 and lactadherin in tumor vasculature. (A) Immunohistochemical staining for panendothelial cell marker CD31 in a B16.F10 melanoma tissue section. Scale bar represents 20 μm. (B) Immunohistochemical staining for lactadherin in a sequential B16.F10 melanoma tissue section. Scale bar represents 20 μm.