PTP4A2 and hepatocellular carcinoma: Then, eight prognostic signatures related to FGFBP2+ NK cell in HCC were identified, including six “risk” genes (UBE2F, AHSA1, PTP4A2, CDKN2D, FTL, RGS2) and two “protective” genes (KLF2, GZMH) (Fig. 5C).