HGF and brain neoplasm: Other growth factors involved in brain tumors are insulin-like growth factors, IGFs [43] fibroblast growth factor 2, FGF2 [44], ciliary neurotrophic factor, CNTF [45], hepatocyte growth factor/scatter factor, HGF/SF [46], vascular endothelial growth factor, VEGF [47], and transforming growth factor-β, TGF-β [48, 49].