Abbreviations: EGIL, European Group for the Immunologic Characterization of Leukemias; WHO, World Health Organization; FISH, Fluorescence In Situ Hybridization; HSCT, allogenic hematopoietic stem cell transplantation; OS, overall survival; DFS, disease-free survival; CR, complete remission; MPAL, mixed-phenotype acute leukemia; ALL, acute lymphoblastic leukemia; AML, acute myeloid leukemia; B-L, B-lymphoid markers; T-L, T-lymphoid markers; M, myeloid markers; CVAD, Cyclophosphamide+Vincristine+Adriamycin+Dexamethasone; 7+3, Cytarabine+idarubicin; PMHP, Princess Margaret Hospital Protocol; NA, not available.