Tetrasomy 15q26: A distinct syndrome or Shprintzen-Goldberg syndrome phenocopy?

Brynn Levy, David Tegay, Peter Papenhausen, James Tepperberg, Odelia Nahum, Tammy Tsuchida, Beth A. Pletcher, Leena Ala-Kokko, Stuart Baker, Barbara Frederick, Kurt Hirschhorn, Peter Warburton, Alan Shanske

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


Purpose:The aim of this study was to characterize the clinical phenotype of patients with tetrasomy of the distal 15q chromosome in the form of a neocentric marker chromosome and to evaluate whether the phenotype represents a new clinical syndrome or is a phenocopy of Shprintzen-Goldberg syndrome.Methods:We carried out comprehensive clinical evaluation of four patients who were identified with a supernumerary marker chromosome. The marker chromosome was characterized by G-banding, fluorescence in situ hybridization, single nucleotide polymorphism oligonucleotide microarray analysis, and immunofluorescence with antibodies to centromere protein C.Results:The marker chromosomes were categorized as being neocentric with all showing tetrasomy for regions distal to 15q25 and the common region of overlap being 15q26qter.Conclusion:Tetrasomy of 15q26 likely results in a distinct syndrome as the patients with tetrasomy 15q26 share a strikingly more consistent phenotype than do the patients with Shprintzen-Goldberg syndrome, who show remarkable clinical variation.

Original languageEnglish
Pages (from-to)811-818
Number of pages8
JournalGenetics in Medicine
Issue number9
StatePublished - Sep 2012


  • Marfanoid habitus
  • Shprintzen-Goldberg syndrome
  • craniosynostosis
  • neocentromere
  • tetrasomy 15q26


Dive into the research topics of 'Tetrasomy 15q26: A distinct syndrome or Shprintzen-Goldberg syndrome phenocopy?'. Together they form a unique fingerprint.

Cite this