In some studies, PD-L1 expression was more often seen in PCs with lymph node metastases, sometimes reaching a statistically significant association: Xian et al. (n = 279; p = 0.0294) [43]; Sharma et al. (n = 220; pN0 10.1% vs. pN1 27.3%; p = 0.086) [27,35]. This evidence concerns the gene CD274 and metastatic malignant neoplasm in the lymph nodes.