CD274 and metastatic malignant neoplasm in the lymph nodes: Lymph node metastasis correlated with PD-L1 (28-8) negativity in cancer cells (p = 0.002), while higher Ki-67 LI correlated with PD-L1 (28-8) positivity and PD-L1 (E1L3N) positivity in immune cells (p = 0.010 and p = 0.001, respectively) (Fig. 3).