VEGFA and breast cancer: Estrogens are also well known to be a risk factor for breast cancer by enhancing the expression of genes involved in tumor cell survival and proliferation as well as growth factors including vascular endothelial growth factor (VEGF) [83], epidermal growth factor (EGF), insulin growth factor (IGF), fibroblast growth factor (FGF) [69,84], and their receptors [8].