CD274 and neoplasm: For Radiosensitivity-PD-L1 classification [19], we detected the highest proportion of the active immune subgroup within the radiosensitive (RS)-PD-L1-low subtypes (Chi-square, 77.5%, P < 0.05), while the exhausted immune subgroup of tumours harboured the highest proportion of the radioresistant (RR)-PD-L1-high subtype (Chi-square, 63.3%, P < 0.05).