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Facioscapulohumeral dystrophy and scapuloperoneal syndromes
1University Department of Clinical Neurosciences, UCL Institute of Neurology, London, UK.
Handbook of Clinical Neurology
|April 19, 2011
Summary
Facioscapulohumeral muscular dystrophy (FSHD) is a common genetic disorder affecting facial and arm muscles. While lifespan isn't significantly impacted, its complex genetics and diagnostic challenges require ongoing research for effective treatments.
Area of Science:
- Neurology
- Genetics
- Epidemiology
Background:
- Facioscapulohumeral muscular dystrophy (FSHD) is the third most prevalent muscular dystrophy globally.
- Characterized by progressive muscle weakness in the face, shoulders, and upper arms.
- Autosomal dominant inheritance pattern with complex molecular genetics.
Purpose of the Study:
- To review the epidemiology, pathogenesis, genetics, clinical features, and management of FSHD.
- To discuss the diagnostic complexities and potential for false-negative results.
- To provide an overview of FSHD and the related scapuloperoneal syndrome.
Main Methods:
- Review of existing literature on FSHD and scapuloperoneal syndrome.
- Analysis of epidemiological data, including prevalence and incidence.
- Examination of molecular genetic findings, focusing on D4Z4 repeat sequences and epigenetic effects.
Main Results:
- FSHD affects approximately 4 in 100,000 individuals worldwide.
- The disease involves complex epigenetic mechanisms related to the D4Z4 repeat sequence.
- Current treatments are supportive, as no medication significantly alters the disease course.
Conclusions:
- FSHD is a significant genetic neuromuscular disorder with complex underlying mechanisms.
- Accurate molecular genetic diagnosis can be challenging.
- Management focuses on supportive care, with no current disease-modifying therapies.
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