Friedreich’s ataxia associated with mitochondrial myopathy: Clinicopathologic report

Catherine L. Gallagher, Andrew J. Waclawik, Brad R. Beinlich, Cary O. Harding, Richard M. Pauli, Josée Poirer, Massimo Pandolfo, M. Shahriar Salamat

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

A 13-year-old boy with clinical and electrophysiologic findings of Friedreich’s ataxia developed unusually prominent myopathy. Skeletal muscle biopsy showed mitochondrial proliferation and structural abnormalities. No mutation was found in skeletal muscle mitochondrial DNA to explain this finding. Molecular genetic and pathologic studies confirmed a diagnosis of Friedreich’s ataxia in the proband and affected relatives. Although the Friedreich’s ataxia phenotype results from decreased expression of a mitochondrially targeted protein, frataxin, mitochondrial myopathy has not been described as a feature of the disease. The association between the frataxin gene mutation and mitochondrial myopathy in this case suggests that severe or cumulative insults to mitochondrial function may produce myopathic changes in some cases of Friedreich’s ataxia. The patient also responded clinically to carnitine supplementation, suggesting a potential palliative therapy for the disease.

Original languageEnglish (US)
Pages (from-to)453-456
Number of pages4
JournalJournal of child neurology
Volume17
Issue number6
DOIs
StatePublished - Jun 2002

ASJC Scopus subject areas

  • Pediatrics, Perinatology, and Child Health
  • Clinical Neurology

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