Phenotype-genotype correlations in 17 new patients with an Xp11.23p11.22 microduplication and review of the literature.
Am J Med Genet A. – 2014 Nov 25
Nizon M1, Andrieux J, Rooryck C, de Blois MC, Bourel-Ponchel E, Bourgois B, Boute O, David A, Delobel B, Duban-Bedu B, Giuliano F, Goldenberg A, Grotto S,Héron D, Karmous-Benailly H, Keren B, Lacombe D, Lapierre JM, Le Caignec C, Le Galloudec E, Le Merrer M, Le Moing AG, Mathieu-Dramard M, Nusbaum S,Pichon O, Pinson L, Raoul O, Rio M, Romana S, Roubertie A, Colleaux L, Turleau C, Vekemans M, Nabbout R, Malan V.
Array comparative genomic hybridization (array CGH) has proven its utility in uncovering cryptic rearrangements in patients with X-linked intellectual disability. In 2009, Giorda et al. identified inherited and de novo recurrent Xp11.23p11.22 microduplications in two males and six females from a wide cohort of patients presenting with syndromic intellectual disability. To date, 14 females and 5 males with an overlapping microduplication have been reported in the literature. To further characterize this emerging syndrome, we collected clinical and microarray data from 17 new patients, 10 females, and 7 males. The Xp11.23p11.2 microduplications detected by array CGH ranged in size from 331 Kb to 8.9 Mb. Five patients harbored 4.5 Mb recurrent duplications mediated by non-allelic homologous recombination…