A neocentromere derived from a supernumerary marker deleted from the long arm of chromosome 6Qin N.a · Bartley J.a · Wang J.-C.b · Warburton P.E.c
aGenzyme Genetics, Orange; bGenzyme Genetics, Pasadena, CA cDepartment of Human Genetics, Mount Sinai School of Medicine, New York, NY (USA)
Parental chromosome studies were referred to us after initial finding of a balanced translocation involving chromosomes 4 and 15 in their phenotypically abnormal male child (cytogenetic analysis was done at another laboratory). In addition to the same 4;15 translocation, the father also had an interstitial deletion of the long arm of one chromosome 6 and a marker chromosome. In this article, we report a neocentromere on this marker, which was determined to be composed of chromosome 6 material by FISH. The child’s karyotype was re-interpreted to be unbalanced due to the presence of the abnormal chromosome 6, but without the marker. The clinical phenotype associated with the interstitial deletion of chromosome 6 is also reported.
© 2007 S. Karger AG, Basel
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This work was supported in part by NIH R01 GM061150.
Manuscript received: 15 December 2006
Accepted in revised form for publication by J. Crolla,: 18 May 2007.
Published online: December 14, 2007
Number of Print Pages : 4
Number of Figures : 5, Number of Tables : 0, Number of References : 12
Cytogenetic and Genome Research
Vol. 119, No. 1-2, Year 2007 (Cover Date: December 2007)
Journal Editor: Schmid, M. (Würzburg)
ISSN: 1424–8581 (print), 1424–859X (Online)
For additional information: http://www.karger.com/CGR