PECAM1 and neoplasm: These included vascular features, such as vessel density (CD31), perfusion (lectin) and angiogenesis (VEGFR2); lymph vessels (LYVE-1); extracellular matrix components, such as αSMA, collagen I and collagen IV; tumour-associated macrophages (TAM; F4/80); and tumour cell density (4,6-diamidino-2-phenylindole).