CD274 and cancer: The pathways in the KEGG enrichment analysis were related to Epstein-Barr virus (EBV) infection (hsa05169), Th17 cell differentiation (hsa04659), Th1 and Th2 cell differentiation (hsa04658), tuberculosis (hsa05152), PD-L1 expression, and the PD-1 checkpoint pathway in cancer (hsa05235).