IL-17A produced by neutrophils exacerbates tumor growth by inducing CXC chemokines (CXCL1, CXCL2, CXCL3, CXCL5, CXCL8, and CXCL11) in gastric cancer cells to recruit neutrophils to the invasive edge. The gene discussed is CXCL8; the disease is neoplasm.