In TCGA, a high KDM1A mRNA level correlated significantly with a high TIL percentage, low fraction of CD8+T cells, high fraction of CD4+T cells and high level of cancer/testis antigens (CTAs) (p = 0.039, 0.038, 0.012, 0.009, respectively) (Figure 3B). The gene discussed is CD4; the disease is cancer.