Moreover, four genes in this module with a degree ≥ 10 in the PPI network were thought to play key roles in USP32-related molecular networks in HCC, and they are all from Melanoma Antigen Gene (MAGE) family, including MAGEA3 (degree = 11), MAGEC1 (degree = 11), MAGEC2 (degree = 11) and MAGEA1 (degree = 10). The gene discussed is MAGEA1; the disease is hepatocellular carcinoma.