Our results indicated that the expression of EFHD2 was closely related to immune infiltration, among which 18 cancers were significantly correlated with T cells CD8 cells, 14 cancers were significantly correlated with T cells regulatory (Tregs) cells, and 15 cancers were significantly correlated with T cells CD4 memory activated cells (Figure 8). The gene discussed is EFHD2; the disease is cancer.