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Three new cases with a mosaicism involving a normal cell line and a cryptic unbalanced autosomal reciprocal translocation.

Abstract：

:Mosaicism involving a normal cell line and an unbalanced autosomal translocation are rare. In this study we present three new cases with such a mosaicism, which were detected by Single Nucleotide Polymorphism (SNP) array analysis in our routine diagnostic setting. These cases were further characterized using Fluorescence in situ Hybridisation (FISH) analysis and conventional karyotyping. The first case is a mentally retarded male who carries an unbalanced translocation in 87% of his cells. The phenotypically normal mother carries the balanced form of the translocation in all her cells. The second case is a phenotypically normal female who has an unbalanced translocation in 52% of her cells. The inheritance could not be determined. The third case is a female referred for Rubinstein-Taybi syndrome who carries an unbalanced translocation in 60% of her cells. Both parents of this case showed a normal karyotype. The mechanisms that might be responsible for these mosaic karyotypes are discussed. Furthermore, we demonstrate that high-resolution whole-genome SNP array is a powerful tool to reveal cryptic unbalanced translocations and mosaicisms, including the more rare cases.

journal_name

Eur J Med Genet

journal_title

European journal of medical genetics

authors

Gijsbers AC,Dauwerse JG,Bosch CA,Boon EM,van den Ende W,Kant SG,Hansson KM,Breuning MH,Bakker E,Ruivenkamp CA

doi

10.1016/j.ejmg.2011.05.002

subject

Has Abstract

pub_date

2011-07-01 00:00:00

pages

e409-12

issue

4

eissn

1769-7212

issn

1878-0849

pii

S1769-7212(11)00064-4

journal_volume

54

pub_type

杂志文章

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