A cutoff value of 52.81 or lower for NKG2D percentages on NK cells and 1.47 or lower for NKG2D MFI distinguished patients with HCC from cirrhotic patients, with a sensitivity of 50% and 70%, respectively, a specificity of 93.3% and 70%, respectively, and an accuracy of 71.7% and 70%, respectively (Table 6, Figures 3 and 4). Here, KLRK1 is linked to hepatocellular carcinoma.