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Lookup NU author(s): Dr Lucy Chilton,
Professor Christine Harrison FRCPath FMedSci,
Professor Anthony MoormanORCiD
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High hyperdiploidy (HeH, 51-65 chromosomes) is an established genetic subtype of acute lymphoblastic leukaemia (ALL). The clinical and cytogenetic features as well as outcome of HeH among adolescents and adults have not been thoroughly investigated. Among 1232 B-cell precursor ALL patients (15-65 years) treated in the UKALLXII/ECOG2993 trial, 160 (13%) had a HeH karyotype, including 80 patients aged >24 years. The frequency of HeH was the same in Philadelphia chromosome (Ph)-positive and -negative cases, but Ph-positive patients were older. The cytogenetic profiles of Ph-positive and Ph-negative HeH cases were similar, although trisomy 2 was strongly associated with Ph-positive HeH. Overall, Ph-positive HeH patients did not have an inferior overall survival compared with Ph-negative patients (P=0.2: 50 vs 57% at 5 years). Trisomy of chromosome 4 was associated with a superior outcome in Ph-negative patients, whereas + 5 and +20 were associated with an inferior outcome in Ph-positive and Ph-negative patients, respectively. All three markers retained significance in multivariate analysis adjusting for age and white cell count: hazard ratio for risk of death 0.47 (95% Cl: 0.27-0.84) (P=0.01), 3.73 (1.51-9.21) (P=0.004) and 2.63 (1.25-5.54) (P=0.01), respectively. In conclusion, HeH is an important subtype of ALL at all ages and displays outcome heterogeneity according to chromosomal gain.
Author(s): Chilton L, Buck G, Harrison CJ, Ketterling RP, Rowe JM, Tallman MS, Goldstone AH, Fielding AK, Moorman AV
Publication type: Article
Publication status: Published
Print publication date: 01/07/2014
Online publication date: 17/01/2014
Acceptance date: 05/12/2013
ISSN (print): 0887-6924
ISSN (electronic): 1476-5551
Publisher: Nature Publishing Group
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