VIPR1 and hepatocellular carcinoma: The expression level of differentially expressed immune-related genes (DEIRGs) was confirmed in Fig. 5C. The ROC and survival analysis results of 6 DEIRGs suggested that only VIPR1 (AUC = 0.975, HR = 0.67, p = 0.023) has both diagnostic and prognostic values in HCC (Fig. 5D and E).