CD274 and neoplasm: Considering that tumor PD-L1 expression level, peripheral platelet to lymphocyte ratio (PLR), lymphocyte to monocyte ratio (LMR), neutrophil to lymphocyte ratio (NLR) and serum LDH level have been reported to correlate with ICI therapy efficacy (23–25), we proceeded to verify PD-L1 status in 30 LUSC patients, along with baseline PLR, LMR, NLR and serum LDH level in the entire cohort of 42 LUSC patients.