From the perspective of expression level, 18 cases (24.3%, 18/74) with tumor PD-L1+ (the proportion of positive cells was 1%–80%) were observed, including 16 cases (88.9%, 16/18) of low-level expression (≥1% and <50%) and two cases (11.1%, 2/18) of high-level expression (≥50%). The gene discussed is CD274; the disease is neoplasm.