CD4 and hepatocellular carcinoma: The levels of immune cells in HCC tissues were calculated via CIBERSORT analysis, and the results showed that the abundances of M0 macrophages, T cells, CD4+ memory T cells, activated CD4+ memory cells, resting mast cells, M1 macrophages, memory B cells, follicular helper T cells, naïve B cells, resting dendritic cells, eosinophils, neutrophils, resting NK cells, and monocytes differed significantly in the high- and low-risk groups (Figure 11 and Table 4).