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. This evidence concerns the gene CXCL1 and neoplasm.