Expression of VEGFR2 in vascular endothelial cells is well established. VEGFR2 protein can also be detected inside tumor cells of human colorectal [fourteen,fifteen], breast [169], and non-small mobile lung [202] cancers between other tumor sorts [238]. However, the validity of VEGFR2 expression data in human tumor cells has turn out to be a subject of latest desire [29]. A amount of elements can