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A multiple translocation event in a patient with hexadactyly, facial dysmorphism, mental retardation and behaviour disorder characterised comprehensively by molecular cytogenetics. Case report and review of the literature.

A multiple translocation event in a patient with hexadactyly, facial dysmorphism, mental retardation and behaviour disorder characterised comprehensively by molecular cytogenetics. Case report and review of the literature.

Authors :
Seidel, Jörg
Heller, Anita
Senger, Gabriele
Starke, Heike
Chudoba, Ilse
Kelbova, Christina
Tönnies, Holger
Neitzel, Heidemarie
Haase, Claudia
Beensen, Volkmar
Zintl, Felix
Claussen, Uwe
Liehr, Thomas
Seidel, Jörg
Tönnies, Holger
Source :
European Journal of Pediatrics; 2003, Vol. 162 Issue 9, p582-588, 7p
Publication Year :
2003

Abstract

<bold>Unlabelled: </bold>We report a 13-year-old female patient with multiple congenital abnormalities (microcephaly, facial dysmorphism, anteverted dysplastic ears and postaxial hexadactyly), mental retardation, and adipose-gigantism. Ultrasonography revealed no signs of a heart defect or renal abnormalities. She showed no speech development and suffered from a behavioural disorder. CNS abnormalities were excluded by cerebral MRI. Initial cytogenetic studies by Giemsa banding revealed an aberrant karyotype involving three chromosomes, t(2;4;11). By high resolution banding and multicolour fluoresence in-situ hybridisation (M-FISH, MCB), chromosome 1 was also found to be involved in the complex chromosomal aberrations, confirming the karyotype 46,XX,t(2;11;4).ish t(1;4;2;11)(q43;q21.1;p12-p13.1;p14.1). To the best of our knowledge no patient has been previously described with such a complex translocation involving 4 chromosomes. This case demonstrates that conventional chromosome banding techniques such as Giemsa banding are not always sufficient to characterise complex chromosomal abnormalities. Only by the additional utilisation of molecular cytogenetic techniques could the complexity of the present chromosomal rearrangements and the origin of the involved chromosomal material be detected. Further molecular genetic studies will be performed to clarify the chromosomal breakpoints potentially responsible for the observed clinical symptoms.<bold>Conclusion: </bold>This report demonstrates that multicolour-fluorescence in-situ hybridisation studies should be performed in patients with congenital abnormalities and suspected aberrant karyotypes in addition to conventional Giemsa banding. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
03406199
Volume :
162
Issue :
9
Database :
Complementary Index
Journal :
European Journal of Pediatrics
Publication Type :
Academic Journal
Accession number :
10956388
Full Text :
https://doi.org/10.1007/s00431-003-1254-3