CD274 and squamous cell carcinoma: According to the manual scoring results, there were 67 PD-L1–negative cases (TPS < 1%; 18 squamous cell carcinomas cases, 48 adenocarcinomas cases and 1 adenosquamous carcinomas cases), 52 low expression cases (1% ≤ TPS < 25%; 24 squamous cell carcinomas cases and 28 adenocarcinomas cases), 13 moderate expression cases (25% ≤ TPS < 50%; four squamous cell carcinomas cases and nine adenocarcinomas cases), and 60 high expression cases (TPS ≥ 50%; 41 squamous cell carcinomas cases, 16 adenocarcinomas cases, and three adenosquamous carcinomas cases).