Expression of vascular endothelial growth factor and its receptors VEGFR-1 and 2 in gastrointestinal stromal tumors, leiomyomas and schwannomas

Figure 1 Immunohistochemical staining reveals VEGF expression in the cytoplasm of GIST (A), leiomyoma (B) and schwannoma (C) cells; VEGFR-1 expression in the membrane and cytoplasm of GIST (E), leiomyoma (F) and schwannoma (G) cells; VEGFR-2 expression in the membrane and cytoplasm of GIST (I), leiomyoma (J) and schwannoma (K) cells; negative staining of GIST for VEGF, VEGFR-1 or VEGFR-2 in Figure 1D, H or L, respectively. BCIP/NBT reaction product demonstrating VEGF, VEGFR-1 and 2 levels. (magnification: x 200).