Context.-In the 2016 update of the World Health Organization (WHO) classification of hematopoietic neoplasms, BCR-ABL1 like B-acute lymphoblastic leukemia/lymphoma (B-ALL) is added as a new provisional entity that lacks the BCR-ABL1 translocation but shows a pattern of gene expression very similar to that seen in B-ALL with BCR-ABL1.
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