title: Jacobsen and Beckwith-Wiedemann syndromes in a child with mosaicism for partial 11pter trisomy and partial 11qter monosomy.
abstract: We report on a child with Jacobsen syndrome (JBS, OMIM 147791) and abnormalities consistent with Beckwith-Wiedemann syndrome (BWS, OMIM 130650). The constitutional karyotype was apparently normal, but FISH analysis with probes specific for the short and long arms of chromosome 11 found 11qter deletion with 11pter trisomy in 80% of the cells studied. Array-CGH identified breakpoints in the 11p15.3 and 11q24.1 regions consistent with Jacobsen and Beckwith-Wiedemann syndromes. We suggest that this chromosome imbalance results from a pericentric inversion of chromosome 11 inherited from the father, with mosaicism resulting from meiotic recombination of a paternal inversion followed by mitotic recombination during the first embryonic divisions. This hypothesis is supported by the results of microsatellite marker analysis. Three previous cases of pericentric inversion and recombination of chromosome 11 have been reported. Our case is unusual in that it combines the Jacobsen and Beckwith-Wiedemann syndromes with mosaicism.
authors: Hospices Civils de Lyon, Service de Cytogénétique Constitutionnelle, Centre de Biologie et de Pathologie Est, Bron, France.
authors: Audrey
authors: A
authors: Putoux
authors: Audrey
authors: A
authors: Labalme
authors: Jean-Marie
authors: JM
authors: André
authors: Marianne
authors: M
authors: Till
authors: Caroline
authors: C
authors: Schluth-Bolard
authors: Jérôme
authors: J
authors: Berard
authors: Yves
authors: Y
authors: Bertrand
authors: Patrick
authors: P
authors: Edery
authors: Guy
authors: G
authors: Putet
authors: Damien
authors: D
authors: Sanlaville
mesh_terms: D000293:Adolescent; D001506:Beckwith-Wiedemann Syndrome / Q000175:diagnosis* / Q000235:genetics; D002872:Chromosome Deletion; D002880:Chromosomes, Human, Pair 11; D055028:Comparative Genomic Hybridization; D019066:Facies; D006801:Humans; D054868:Jacobsen Distal 11q Deletion Syndrome / Q000175:diagnosis* / Q000235:genetics; D007621:Karyotyping; D008297:Male; D025202:Molecular Diagnostic Techniques; D009030:Mosaicism; D014314:Trisomy / Q000175:diagnosis*