What can we learn from old microdeletion syndromes using array-CGH screening?

Abstract:

:Most microdeletion syndromes identified before the implementation of array-comparative genomic hybridization (array-CGH) were presumed to be well-defined clinical entities. However, the introduction of whole-genome screening led not only to the description of new syndromes but also to the recognition of a broader spectrum of features for well-known syndromes. Here, we report on 10 patients presenting with mental retardation associated with atypical features not suggestive of a known microdeletion and a normal standard karyotype. Array-CGH analyses revealed five microdeletions in the DiGeorge region, three microdeletions in the Williams-Beuren region and two microdeletions in the Smith-Magenis region. Reevaluation in these patients confirmed that the diagnosis remained difficult on clinical grounds and emphasized that well-known genomic disorders can have a phenotype that is heterogeneous and more variable than originally thought. The widespread use of array-CGH shows that such patients may be more readily achieved on the basis of genotype rather than phenotype.

journal_name

Clin Genet

journal_title

Clinical genetics

authors

Mosca-Boidron AL,Bouquillon S,Faivre L,Callier P,Andrieux J,Marle N,Bonnet C,Vincent-Delorme C,Berri M,Plessis G,Manouvrier-Hanu S,Dieux-Coeslier A,Thauvin-Robinet C,Pipiras E,Delahaye A,Payet M,Ragon C,Masurel-Paulet A

doi

10.1111/j.1399-0004.2011.01747.x

subject

Has Abstract

pub_date

2012-07-01 00:00:00

pages

41-7

issue

1

eissn

0009-9163

issn

1399-0004

journal_volume

82

pub_type

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