CXCL12 and neoplasm: Other chemokines, such as CCL5, CCL7, CCL8, and CXCL12, as well as tumor cell-produced growth factors, such as vascular endothelial growth factor (VEGF), transforming growth factor-β (TGF-β), and fibroblast growth factor (FGF), are also described as chemotactic for monocytes/macrophages during tumor development [7], [13].