The presence of a monosomal karyotype (MK+) and/or a complex karyotype (CK+) identifies subcategories of AML with poor prognosis. The prognostic significance of the most common monosomies (monosomy 5, monosomy 7, and monosomy 17) within MK+/CK+AML is not well defined. We analyzed data from 1,592 AML patients age 17-93 years enrolled on ECOG-ACRIN therapeutic trials. The majority of MK+ patients (182/195; 93%) were MK+/CK+ with 87% (158/182) having ≥5 clonal abnormalities (CK≥5). MK+ patients with karyotype complexity ≤4 had a median overall survival (OS) of 0.4y compared to 1.0y for MK- with complexity ≤4 (p<0.001), whereas no OS difference was seen in MK+vs. MK- patients with CK≥5 (p=0.82). Monosomy 5 (93%; 50/54) typically occurred within a highly complex karyotype and had no impact on OS (0.4y; p=0.95). Monosomy 7 demonstrated no impact on OS in patients with CK≥5 (p=0.39) or CK≤4 (p=0.44). Monosomy 17 appeared in 43% (68/158) of CK≥5 patients and demonstrated statistically significant worse OS (0.4y) compared to CK≥5 patients without monosomy 17 (0.5y; p=0.012). Our data suggest that the prognostic impact of MK+is limited to those with less complex karyotypes and that monosomy 17 may independently predict for worse survival in patients with AML.
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| http://dx.doi.org/10.1016/j.leukres.2017.05.010 | DOI Listing |
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