?:definition
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ALL characterized by hypoploidy (less than 44 chromosomes, KMT2A rearranged (t[4;11] or others), t(v;14q32)IgH, t(9;22)(q34;11.2): BCR-ABL1 (defined as high risk in the pre-TKI era), complex karyotype (5 or more chromosomal abnormalities), Ph-like ALL; intrachromosomal amplification of chromosome 21 (iAMP21). (Adapted from NCCN Guidelines, Version 1.2020, February 20, 2020)
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