After polyclonal stimulation, the percentage of TGF-β+ T cells increased 2.6 times in the ALL+CD4+ T cell subset as compared to ALL−CD4+ T cells; no significant differences were observed when we compared Con A-stimulated ALL−CD4+ T cells with nonstimulated cells (Table 2). The gene discussed is TGFB1; the disease is acute lymphoblastic leukemia.