Expression level was classified as tumor cells (TC) 3 (≥ 50%), TC2 (5–49%), TC1 (1–4%), or TC0 (< 1%), and as tumor-infiltrating immune cells (IC) 3 (≥ 50%), IC2 (5–49%), IC1 (1–4%), or IC0 (< 1%) for PD-L1. This evidence concerns the gene CD274 and neoplasm.