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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 
 
 

Syndromal frontonasal dysostosis in a child with a complex translocation involving chromosomes 3, 7, and 11.

We report on a 4-year-old boy with typical frontonasal dysostosis and an apparently balanced de novo translocation involving chromosomes 3, 7, and 11, and four breakpoints. The karyotype was 46,XY,t(7;3)(3;11) (7pter-->7q21.3::3q27-->3qter;3pter-->3 q23::11q21-->11qter; 11pter-->11q21::3q23-->3q27::7q21.3-->7 qter). In situ hybridization with a chromosome 3 painting probe confirmed the interpretation from GTG banding. The child had a widow's peak, marked hypertelorism, absence of the nasal tip, and widely separated nares. He also had an atrial septal defect, micropenis, small testes, clubfeet, scoliosis, block C2-4, and structural brain abnormalities on MRI. In review we found two other cases of frontonasal dysostosis with chromosome abnormalities, neither of which was similar to our case. The presence of a de novo (apparently) balanced translocation in our patient may help to locate the gene(s) for frontonasal dysplasia and perhaps other midline craniofacial malformations.[1]

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