CD274 and metastatic malignant neoplasm in the lymph nodes: The PD-L1 status comparison between samples from lymph node metastases and distant metastases (Figure 4f) had the lowest number of cases (N = 6) and did not show significant results with Pearson’s correlation coefficient (p = 0.718), and Cohen’s kappa agreement was poor or fair (k = 0 for PD-L1 TPS 1% cut-off and k = 0.286 for PD-L1 TPS 50% cut-off).