CD274 and neoplasm: For eosinophils, the review showed that different phenotypes were associated with different environmental stimuli, which could be tumour-promoting or tumour-suppressive [23]; however, in our study, we found that the presence of eosinophils in the parenchyma of the tumour was associated with the high PD-L1 expression (TPS ≥ 50%), which indicated that eosinophils seemed to have a synergistic positive predictive effect with PD-L1, supporting its predictive value.