MYC expression in T-ALL. (A) Sample distribution according to differentiation subgroups. (B) Sample distribution according to NOTCH1/FBXW7 status (further splitting in pediatric vs adult subsets is shown in supplemental Figure 1). MYC expression is normalized to ABL. Dots represent individual samples; median values are indicated by horizontal bars. The nonparametric Mann-Whitney test was used to calculate P values.