BCR-ABL1 positive B-ALL can undergo T-cell lineage shift to become CD19 negative T-ALL. Issue 3 (June 2018) - De Bie, Jolien; Demeyer, Sofie; Gielen, Olga; Segers, Heidi; Michaux, Lucienne; Vandenberghe, Peter; Boeckx, Nancy; Uyttebroeck, Anne; Cools, Jan