SCA8 repeat expansions in ataxia: A controversial association

M. J. Sobrido, J. A. Cholfin, S. Perlman, S. M. Pulst, D. H. Geschwind

Research output: Contribution to journalArticlepeer-review

52 Scopus citations


The observation of large SCA8 alleles in healthy control subjects and nonataxic patients, together with a lack of segregation of the expanded repeat with ataxia in several families, has raised questions about the pathogenic role of the SCA8 expansion. The authors found allele sizes within the proposed pathogenic range in three patients with ataxia of unknown etiology, in two individuals from pedigrees with either SCA2 or Friedreich's ataxia, and in two patients with Alzheimer's disease. Sizing of SCA8 alleles should not be a routine diagnostic test until its etiologic role is clarified and the pathogenic threshold is determined.

Original languageEnglish
Pages (from-to)1310-1312
Number of pages3
Issue number7
StatePublished - 9 Oct 2001
Externally publishedYes


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