CXCR2 and neoplasm: We observed a difference in terms of tumor infiltration for CD11b-, CD66b- and CXCR2-positive cells (p < 0.001), with CXCR2 showing the highest infiltration (median: 1591 CXCR2+ cells/cm2; range: 0–540,653 CXCR2+ cells/cm2), followed by CD11b (median: 1305 CD11b+ cells/cm2; range: 0–205,122 CD11b+ cells/cm2) and CD66b (median: 90 CD66b+ cells/cm2; range: 0–431,006 CD66b+ cells/cm2).