PDCD1 and neoplasm: Expression levels of PD-L1 on TILs were significantly correlated with PD-L1 expression on the tumor (p = < 0.001), and PD-1 (p = 0.007), LAG-3 (p = 0.005), whereas PD-L1 expression on TILs was found to be correlated with TIM-3 expression levels on TILs (p = 0.055) that did not reach the statistical significance (Table 1).