When we analyzed the frequencies of NK (CD56+ CD3-) and NKT cells (CD56+ CD3+), we observed increased proportions of the CD56hi subset of NK cells, both in the peritumoral (18.49 ± 6.51) and tumoral tissues (19.6 ± 6.13), as compared to those in the peripheral blood mononuclear cells (PBMC) of the same HCC patients (5.71 ± 1.59) and in the PBMC of healthy donors (7.47 ± 2.21) (Figure 2a and Table 2). Here, NCAM1 is linked to hepatocellular carcinoma.