Moreover, the frequency of genotype A/A did not differ between the HCC group and the non-HCC group according to KIR3DL1 + HLA-Bw4 positivity (60.6% vs. 39.4%; p = 0.181) or negativity (50.9% vs. 38.5%; p = 0.693). Here, KIR3DL1 is linked to hepatocellular carcinoma.