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    Diagnosis Destinations Pervasive Developmental Disorder Research

    Clin Genet 2001 Dec;60(6):421-30

    A family with a grand-maternally derived interstitial duplication of proximal 15q.

    Boyar FZ, Whitney MM, Lossie AC, Gray BA, Keller KL, Stalker HJ, Zori RT, Geffken G, Mutch J, Edge PJ, Voeller KS, Williams CA, Driscoll DJ.

    Raymond C. Philips Unit, Division of Pediatric Genetics, Department of Pediatrics and Center for Mammalian Genetics, University of Florida College of Medicine, Gainesville 32610-0296, USA.

    About 1% of individuals with autism or types of pervasive developmental disorder have a duplication of the 15q11-q13 region. These abnormalities can be detected by routine G-banded chromosome study, showing an extra marker chromosome, or demonstrated by fluorescence in situ hybridization (FISH) analysis, revealing an interstitial duplication. We report here the molecular, cytogenetic, clinical and neuropsychiatric evaluations of a family in whom 3 of 4 siblings inherited an interstitial duplication of 15q11-q13. This duplication was inherited from their mother who also had a maternally derived duplication. Affected family members had apraxia of speech, phonological awareness deficits, developmental language disorder, dyslexia, as well as limb apraxia but did not have any dysmorphic clinical features. The observations in this family suggest that the phenotypic manifestations of proximal 15q duplications may also involve language-based learning disabilities.

    PMID: 11846734 [PubMed - indexed for MEDLINE]


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    Speechville Express is a resource for families, educators, and medical professionals, offering information about language development in children, helping those who care for toddlers and young children who are late talkers, and connecting you with others who have been down this road. Language disorders and communication impairments included are apraxia, stuttering, pervasive developmental disorder, dysarthria, and aphasia, among others.

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