Wei et al. and Fujino et al. both report cases of γδ T-ALL harboring unique AF10 fusion transcripts [3, 5] Moreover, T-ALL/LBL was formerly stratified into four immunophenotypic subtypes, corresponding to stages of normal T-cell differentiation: (1) pro-T/T-I, (2) pre-T/T-II, (3) cortical T, T-III, and medullary T/T-IV [4]. The gene discussed is MLLT10; the disease is acute lymphoblastic leukemia.