419176.fig.001a
(a)
419176.fig.001b
(b)
Figure 1: RCC tumor angiogenesis. (a) Factors influencing promotion of tumor angiogenesis. (b) Tumor vessel sprouting and metastasis. Ang-1; angiopoietin-1; FGF; fibroblast growth factor; PDGF; platelet derived growth factor; RCC; renal cell carcinoma; VEGF; vascular endothelial growth factor.