CXCL8 and neoplasm: The increase in expression of various factors such as growth factor and tumor stimulating factors during hypoxia can induce angiogenesis, as they increase proliferation and ensure stabilization of endothelial cells, which are not only caused by HIF-1α, but also by cytokines such as interleukin IL-8, or other growth factors, such as PDGF [8, 9].