For nontumor samples, genes in the N gene sets were associated with T cell activation, leukocyte cell-cell adhesion, regulation of T cell activation, T cell receptor signaling pathway, natural killer cell mediated cytotoxicity, PD-L1 expression, PD-1 checkpoint pathway in cancer, etc. (Figures 6(c) and 6(d)). The gene discussed is PDCD1; the disease is cancer.