CXCL2 and breast neoplasm: Breast tumors produce various factors, such as G-CSF, granulocyte/macrophage stimulating factor (GM-CSF), IL-6, IL-1β, IL-17, TGF-β, C-X-C motif chemokine 2 (CXCL2; encoded by CXCL2), C-X-C motif chemokine 5 (CXCL5; encoded by CXCL5), and CCL2.