This analysis revealed a positive correlation between RAP2A expression with B cells (r = 0.3, p = 1.37e-08), CD8+ T cells (r = 0.237, p = 9.06e-06), CD4+ T cells (r = 0.474, p = 1.16e-20), macrophages (r = 0.469, p = 4.56e-20), neutrophils (r = 0.374, p = 7.19e-13), and dendritic cells (r = 0.401, p = 1.36e-14) in HCC (Figure 9A). The gene discussed is CD8A; the disease is hepatocellular carcinoma.