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Croat Med J. 2003 Aug;44(4):477-9.

Small supernumerary marker chromosome derived from proximal p-arm of chromosome 2: identification by fluorescent in situ hybridization.

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  • 1Division of Genetics and Metabolism, Cytogenetic Laboratory, Department of Pediatrics, Zagreb University Hospital Center, Zagreb, Croatia. lasan_ruzica@hotmail.com

Abstract

Conventional cytogenetics detected an interstitial deletion of proximal region of p-arm of chromosome 2 in a 6-month-old boy with a phenotype slightly resembling Down's syndrome. The deletion was inherited from the father, whose karyotype revealed a small ring-shaped marker chromosome, in addition to interstitial deletion. Fluorescence in situ hybridization identified the marker, which consisted of the proximal region of the p-arm of chromosome 2, including a part of its centromere. This case shows that molecular cytogenetic analysis can reveal the mechanism of the formation of the marker chromosome.

PMID:
12950153
[PubMed - indexed for MEDLINE]
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