Facioscapulohumeral muscular dystrophy
Facioscapulohumeral Muscular Dystrophy[edit | edit source]
Facioscapulohumeral muscular dystrophy (FSHD) is a genetic muscle disorder characterized by progressive skeletal muscle weakness. It primarily affects the muscles of the face, shoulder blades, and upper arms.
Signs and Symptoms[edit | edit source]
FSHD symptoms typically begin in adolescence or early adulthood. Common signs include:
- Weakness in the facial muscles, leading to difficulty with facial expressions.
- Scapular winging due to weakness in the shoulder girdle muscles.
- Weakness in the upper arm muscles, affecting the ability to lift objects.
- As the disease progresses, it may also affect the abdominal muscles and lower limb muscles.
Genetics[edit | edit source]
FSHD is usually inherited in an autosomal dominant pattern. It is associated with a genetic mutation on chromosome 4, specifically a contraction of the D4Z4 repeat region. There are two main types of FSHD:
- FSHD1: Caused by a contraction of the D4Z4 repeat on chromosome 4q35.
- FSHD2: Involves mutations in the SMCHD1 gene, which affects the same region.
Diagnosis[edit | edit source]
Diagnosis of FSHD is based on clinical evaluation, family history, and genetic testing. Electromyography (EMG) and muscle biopsy may also be used to assess muscle function and structure.
Management[edit | edit source]
There is currently no cure for FSHD, but management focuses on maintaining muscle function and quality of life. Treatment options include:
- Physical therapy to improve muscle strength and flexibility.
- Occupational therapy to assist with daily activities.
- Use of orthotic devices to support weakened muscles.
- Pain management strategies, including medications and lifestyle modifications.
Research[edit | edit source]
Ongoing research aims to better understand the genetic mechanisms of FSHD and develop targeted therapies. Clinical trials are exploring potential treatments, including gene therapy and myostatin inhibitors.
See Also[edit | edit source]
References[edit | edit source]
External Links[edit | edit source]
- [FSHD Society](https://www.fshdsociety.org/)
- [Muscular Dystrophy Association](https://www.mda.org/)
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Contributors: Prab R. Tumpati, MD