In addition, we analyzed the association between FCNs and RFS of HCC patients using GEPIA, and found that the higher the expression of FCN1 and FCN3, the higher the survival rate of patients (p < 0.05), and there was no significant correlation between the expression of FCN2 and RFS (p > 0.05) (Supplementary Figure S1A–C). The gene discussed is FCN2; the disease is hepatocellular carcinoma.