Table 1 showed that surgery, TNM stage, T stage, the status of lymph nodes, and primary tumor location were related to PD-L1 expression (P < 0.05). Table 2 showed that the T stage, the status of lymph nodes, and primary tumor location were related to PD-L1 expression (P < 0.05). Apart from them, no obvious correlation was observed between EGFR and PD-L1 expression with clinicopathologic characteristics, as shown in Tables 1 and 2. Here, EGFR is linked to neoplasm.