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Cytogenetics of Childhood Acute Myeloid Leukemia: United Kingdom Medical Research Council Treatment Trials AML 10 and 12

Lookup NU author(s): Professor Christine Harrison FRCPath FMedSci, Professor Anthony Moorman

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Abstract

Purpose Karyotype is an independent indicator of prognosis in acute myeloid leukemia (AML) that is widely applied to risk-adapted therapy. Because AML is rare in children, the true prognostic significance of individual chromosomal abnormalities in this age group remains unclear. Patients and Methods This cytogenetic study of 729 childhood patients classified them into 22 subgroups and evaluated their incidence and risk. Results Rearrangements of 11q23 were the most frequent abnormality found in approximately 16% of patients, with 50% of these in infants. The outcome for all patients with 11q23 abnormalities was intermediate; no difference was observed for those with t(9;11)(p21-22;q23). The core binding factor leukemias with the translocations t(8;21)(q22;q22) and inv(16)(p13q22) occurred at incidences of 14% and 7%, respectively, predominantly in older children, and their prognosis was favorable. An adverse outcome was observed in patients with monosomy 7, abnormalities of 5q, and t(6;9)(p23;q34). Abnormalities of 3q and complex karyotypes, in the absence of favorable-risk features, have been associated with an adverse outcome in adults, but the results were not significant in this childhood series. However, the presence of 12p abnormalities predicted a poor outcome. Conclusion Because the spectrum of chromosomal changes and their risk association seem to differ between children and adults with AML, biologic differences are emerging, which will contribute to the redefinition of risk stratification for different age groups in the future. J Clin Oncol 28:2674-2681. (C) 2010 by American Society of Clinical Oncology


Publication metadata

Author(s): Harrison CJ, Hills RK, Moorman AV, Grimwade DJ, Hann I, Webb DKH, Wheatley K, de Graaf SSN, van den Berg E, Burnett AK, Gibson BES

Publication type: Article

Publication status: Published

Journal: Journal of Clinical Oncology

Year: 2010

Volume: 28

Issue: 16

Pages: 2674-2681

Print publication date: 03/05/2010

ISSN (print): 0732-183X

ISSN (electronic): 1527-7755

Publisher: American Society of Clinical Oncology

URL: http://dx.doi.org/10.1200/JCO.2009.24.8997

DOI: 10.1200/JCO.2009.24.8997


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