CD274 and neoplasm: Regarding eosinophils, there were 45 cases with eosinophils appearing in both the parenchyma of the tumour and the stroma, and the level of PD-L1 expression was higher than in the other 63 cases (12 cases and 4 cases with TPS ≥ 50%, respectively, P = 0.003); however, there was no significant difference for the cutoff point of 1% (27 cases and 32 cases, respectively, P = 0.343) (Additional file 5: Table S5).