To validate these findings and high expression of MEF2C in ETP/immature patients, we used our original gene set based on 416 genes (435 probe sets) to predict specific T-ALL subtypes in an extended cohort of pediatric and young adult patients with T-ALL (n = 264) that has been well annotated genetically using whole-exome and whole RNA-Seq (6). This evidence concerns the gene MEF2C and acute lymphoblastic leukemia.