PDCD1 and neoplasm: Figure 8A shows that the risk score values are correlated with the immune score, tumor purity, TBK1, ESTIMATE score, IRF3, stromal score, MB21D1, PD-1, and CTLA-4. Figure S5 showed significant differences in the CYT, immune score, ESTIMATE score, stromal score, and tumor purity based on the Wilcoxon test between the two risk score subtypes (P<0.0001).