As shown in Fig. 4A, SLA2 expression levels were positively correlated with numerous types of immune cells, e.g., T cells, Cytotoxic cells, TReg, aDC, NK CD56dim cells, follicular helper T cell (TFH), CD8 T cells, T helper cells, T helper 1 cells (Th1 cells), B cells, DC, plasmacytoid dendritic cells (pDC), Tem cells, Macrophages, Th2 cells, Eosinophils, interdigitating dendritic cell (iDC), Th17 cells, NK cells, central memory T cells (Tcm), Mast cells, and Neutrophils, all of which play an important role in anti-tumor immunity. The gene discussed is CD8A; the disease is neoplasm.