Among the 19 candidate genes, 19 genes AURKA, NCAPG, CCNA2, TPX2, TOP2A, KIF20A, MELK, TRIP13, KIF2C, PRC1, ASPM, TKIF4A, CENPF, CDC20, PTTG1, CDCA5, TK1, MCM2, HJURP are high in HCC Express. The gene discussed is PTTG1; the disease is hepatocellular carcinoma.