To identify cytokines important for the regulation of PD-L1 expression in NSCLC, we first comprehensively examined the relation between expression of the genes for 26 major cytokines and PD-L1 gene expression in lung adenocarcinoma (LUAD) with the use of data from 566 LUAD tissue specimens available through cBioportal for cancer genomics data (Supplementary Table 1). This evidence concerns the gene CD274 and non-small cell lung carcinoma.