CXCR4 and neoplasm: We also tested the expression of HLA‐DR in neutrophils, which has been reported to have anti‐tumor antigen‐presenting potency.[33] The results showed that the proportion of HLA‐DR+ neutrophils was low (approximately 5%) in LSCC, and no significant difference in HLA‐DR expression was observed between CXCR4+ and CXCR4− neutrophils.