CD274 and small cell lung carcinoma: This finding was further supported by the IHC data on the 66 SCLC patients, where significantly longer OS was observed in patients with higher level of CD3 (Fig. 7e, HR = 0.32, p = 0.0167) or positive PD-L1 expression (Fig. 7f, HR = 0.35, p = 0.0249).