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Genetic Instability and Intratumoral Heterogeneity in Neuroblastoma with MYCN Amplification Plus 11q Deletion

Journal article
Authors E. Villamon
A. P. Berbegall
M. Piqueras
I. Tadeo
V. Castel
Anna Djos
Tommy Martinsson
S. Navarro
R. Noguera
Published in PLoS ONE
Volume 8
Issue 1
Pages e53740
ISSN 1932-6203
Publication year 2013
Published at Institute of Biomedicine, Department of Medical and Clinical Genetics
Pages e53740
Language en
Links dx.doi.org/10.1371/journal.pone.005...
https://gup.ub.gu.se/file/96649
Subject categories Medical Genetics

Abstract

Background/Aim: Genetic analysis in neuroblastoma has identified the profound influence of MYCN amplification and 11q deletion in patients' prognosis. These two features of high-risk neuroblastoma usually occur as mutually exclusive genetic markers, although in rare cases both are present in the same tumor. The purpose of this study was to characterize the genetic profile of these uncommon neuroblastomas harboring both these high-risk features. Methods: We selected 18 neuroblastomas with MNA plus 11q loss detected by FISH. Chromosomal aberrations were analyzed using Multiplex Ligation-dependent Probe Amplification and Single Nucleotide Polymorphism array techniques. Results and Conclusion: This group of tumors has approximately the same high frequency of aberrations as found earlier for 11q deleted tumors. In some cases, DNA instability generates genetic heterogeneity, and must be taken into account in routine genetic diagnosis.

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