The classification of the PD-L1 expression rate in the 50 EBUS-TBNA specimens obtained from NSCLC patients according to the three categories is depicted in Figure 4A. The concordance rate of PD-L1 expression between EBUS-TBNA and matched TBB specimens obtained from NSCLC patients was 74.0% (37/50). The gene discussed is CD274; the disease is non-small cell lung carcinoma.