CD226 and acute myeloid leukemia: An increase in DNAM-1+TIGIT+TACTILE+ (p < 0.05) and DNAM-1−TIGIT+TACTILE− (p < 0.01) DN T cells and a decrease in DNAM-1− TIGIT− TACTILE+ (p < 0.01) DN T cells were observed in AML patients compared to healthy donors (Figure 6c).