In NSCLC tissues, IHC showed a significant positive correlation between MET and PD-L1 or PD-L2 expression by tumor cells (p < 0.001 for both), with a more consistent positive correlation of MET with PD-L1 than with PD-L2 (Figure 5A–D). Here, PDCD1LG2 is linked to non-small cell lung carcinoma.