Notably, 24 h after transplantation, the concentration of FGF21 differed significantly between ALD and HCC (p = 0.0018), ALD and PBC (p = 0.025), ALD and HCV (p < 0.0001), and HCV and HBV (p = 0.003). The gene discussed is FGF21; the disease is hepatocellular carcinoma.