IL17D and hepatocellular carcinoma: To identify the prognostic biomarkers associated with immune genes of hepatocellular carcinoma, we first identified the immune genes associated DEGs and then constructed an immune-related gene-based prognostic index (IRGPI) composed of ten genes (HSPA4, PSME3, PSMD14, FABP6, ISG20L2, TRAF3, NDRG1, NRAS, CSPG5, IL17D) by Cox regression model and finally verified its correlation with OS.