Univariate Cox proportion hazard ratio analysis showed that tumor T stage (hazard ratio [HR]: 3.8, P = 0.005), N stage (HR: 5.6, P = 0.001), M stage (HR: 13.7, P < 0.001), and PD-L1 expression status (HR: 4.7, P = 0.003) were associated with PFS. Here, CD274 is linked to neoplasm.