Recent studies have revealed that the increased levels of inflammatory cytokines, such as IFN-γ, TNF, and IL-6, in the serum result in a better response to NSCLC anti-PD-1 inhibition and prolonged survival, although these findings are debatable (Network 2012; Ozawa et al. 2019). Here, PDCD1 is linked to non-small cell lung carcinoma.