Tissue sections from HCC13–0109, HCC29–1104, HCC01–0207, HCC15–0114, HCC21–0208, and HCC25–0914 were stained with antibodies against CD31 to assess the degree of tumor angiogenesis, p-histone H3 Ser10 to visualize proliferative cells, and cleaved Poly (ADP-ribose) polymerase (cleaved PARP) to detect apoptotic cells. Here, PECAM1 is linked to neoplasm.