CXCR2 and nonpapillary renal cell carcinoma: Furthermore, neutrophil abundance was significantly associated with the expression of CXCL1, CXCL2, CXCL3, and CXCL5, as well as CXCL‐CXCR2 signaling in ccRCC metastasis samples from the TCGA‐KIRC cohort (Figure S7G, Supporting Information), consistent with the findings in our current study.