The distribution of FAT4 expression scores in HCC was analyzed using “immunedeconv.” The results showed that the Tumor Immune Estimation Resource (TIMER) scores of CD4 + /CD8 + T cells, neutrophils, macrophages, and dendritic cells were significantly increased in HCC tissues with high FAT4 expression compared to that in HCC tissues with low FAT4 expression (Fig. 6a). The gene discussed is CD8A; the disease is hepatocellular carcinoma.