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Am J Med Genet. 1999 Jan 15;82(2):183-6.

A dup(17)(p11.2p11.2) detected by fluorescence in situ hybridization in a boy with Alport syndrome.

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Departamento de Ciências Biológicas, Faculdade de Medicina do Triángulo Mineiro, Uberaba, MG, Brasil.


We describe a de novo dup 17p11 in a boy with Alport syndrome, mild mental retardation, and minor anomalies. Combining classical and molecular cytogenetics analyses, the karyotype was defined as 46,XY.ish dup (17)(p11.2p11.2)(D17S29++,D17S379+). Alport syndrome is associated with mutations in the type IV alpha chain collagen gene, however, no known collagen-related gene is currently mapped to 17p11. Duplications involving 17p11.2 have been reported in Charcot-Marie-Tooth disease, Dejerine-Sottas syndrome, and in a few sporadic patients with mental retardation and minor anomalies, however, no significant clinical similarity was found among these cases and the propositus. Further studies may clarify the meaning of the association between Alport syndrome and duplications of DNA sequences mapped at 17p11.2.

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