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

F. Z. Boyar, M. M. Whitney, A. C. Lossie, B. A. Gray, K. L. Keller, H. J. Stalker, R. T. Zori, G. Geffken, J. Mutch, P. J. Edge, K. S. Voeller, C. A. Williams, D. J. Driscoll

Research output: Contribution to journalArticlepeer-review

53 Scopus citations


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.

Original languageEnglish (US)
Pages (from-to)421-430
Number of pages10
JournalClinical Genetics
Issue number6
StatePublished - 2001
Externally publishedYes


  • Angelman
  • Apraxia of speech
  • Autism
  • Chromosome 15
  • Dyslexia
  • Imprinting
  • Interstitial duplication
  • Phonological awareness deficit

ASJC Scopus subject areas

  • Genetics
  • Genetics(clinical)


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