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Clinical features of Friedreich's ataxia: classical and atypical phenotypes

Parkinson, Michael H., Boesch, Sylvia, Nachbauer, Wolfgang, Mariotti, Caterina, Giunti, Paola·2013·Journal of Neurochemistry

Abstract

One hundred and fifty years since Nikolaus Friedreich's first description of the degenerative ataxic syndrome which bears his name, his description remains at the core of the classical clinical phenotype of gait and limb ataxia, poor balance and coordination, leg weakness, sensory loss, areflexia, impaired walking, dysarthria, dysphagia, eye movement abnormalities, scoliosis, foot deformities, cardiomyopathy and diabetes. Onset is typically around puberty with slow progression and shortened life‐span often related to cardiac complications. Inheritance is autosomal recessive with the vast majority of cases showing an unstable intronic GAA expansion in both alleles of the frataxin gene on chromosome 9q13. A small number of cases are caused by a compound heterozygous expansion with a point mutation or deletion. Understanding of the underlying molecular biology has enabled identification of atypical phenotypes with late onset, or atypical features such as retained reflexes. Late‐onset cases tend to have slower progression and are associated with smaller GAA expansions. Early‐onset cases tend to have more rapid progression and a higher frequency of non‐neurological features such as diabetes, cardiomyopathy, scoliosis and pes cavus. Compound heterozygotes, including those with large deletions, often have atypical features. In this paper, we review the classical and atypical clinical phenotypes of Friedreich's ataxia.

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Metadata

Authors
Parkinson, M. H., Boesch, S., Nachbauer, W., Mariotti, C., & Giunti, P.
Venue
Journal of Neurochemistry
Publisher
Wiley
Published
2013-07-17
Volume
126
Issue
s1
Pages
103-117
ISSN
  • 0022-3042 (ISSN-L)
  • 1471-4159
OpenAlex
W1995962173
Cited by
291
References
94
FWCI
10.63
Type
journal article
Language
en
Open access
closed

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CoChat. (2026). Citation check: Clinical features of Friedreich's ataxia: classical and atypical phenotypes. https://app.cochat.ai/papers/10.1111/jnc.12317
The paper
Parkinson, M. H., Boesch, S., Nachbauer, W., Mariotti, C., & Giunti, P. (2013). Clinical features of Friedreich's ataxia: classical and atypical phenotypes. Journal of Neurochemistry. https://doi.org/10.1111/jnc.12317

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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

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