Health Encyclopedia


More <
bookmarks-menu

Friedreich ataxia

Show Alternative Names
Friedreich's ataxia
Spinocerebellar degeneration

Friedreich ataxia is a rare disease passed down through families (inherited). It affects the muscles and heart.

Causes

Friedreich ataxia is caused by a defect in a gene called frataxin (FXN). Changes in this gene cause the body to make too much of a part of DNA called trinucleotide repeat (GAA). Normally, the body contains about 8 to 30 copies of GAA. People with Friedreich ataxia have as many as 1,000 copies. The more copies of GAA a person has, the earlier in life the disease starts and the faster it gets worse.

Friedreich ataxia is an autosomal recessive genetic disorder. This means you must get a copy of the defective gene from both your mother and father.

Symptoms

Symptoms are caused by the wearing away of structures in areas of the brain and spinal cord that control coordination, muscle movement, and other functions. Symptoms most often begin before puberty. Symptoms may include:

Muscle problems lead to changes in the spine. This may result in scoliosis or kyphoscoliosis.

Heart disease most often develops and may lead to heart failure. Heart failure or dysrhythmias that do not respond to treatment may result in death. Diabetes may develop in later stages of the disease.

Exams and Tests

The following tests may be done:

Blood sugar (glucose) tests may show diabetes or glucose intolerance. An eye exam may show damage to the optic nerve, which most often occurs without symptoms.

Treatment

Treatment for Friedreich ataxia includes:

  • Counseling
  • Speech therapy
  • Physical therapy
  • Walking aids or wheelchairs

Orthopedic devices (braces) may be needed for scoliosis and foot problems. Treating heart disease and diabetes help people live longer and improve their quality of life.

Outlook (Prognosis)

Friedreich ataxia slowly gets worse and causes problems doing everyday activities. Most people need to use a wheelchair within 15 years of the disease's start. The disease may lead to early death.

Possible Complications

Complications may include:

  • Diabetes
  • Heart failure or heart disease
  • Loss of ability to move around

When to Contact a Medical Professional

Contact your health care provider if symptoms of Friedreich ataxia occur, especially if there is a family history of the disorder.

Prevention

People with a family history of Friedreich ataxia who intend to have children may want to consider genetic screening to determine their risk.

Review Date: 10/31/2022

Reviewed By

Neil K. Kaneshiro, MD, MHA, Clinical Professor of Pediatrics, University of Washington School of Medicine, Seattle, WA. Also reviewed by David C. Dugdale, MD, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.

References

Mink JW. Movement disorders. In: Kliegman RM, St. Geme JW, Blum NJ, Shah SS, Tasker RC, Wilson KM, eds. Nelson Textbook of Pediatrics. 21st ed. Philadelphia, PA: Elsevier; 2020:chap 615.

Warner WC, Sawyer JR. Neuromuscular disorders. In: Azar FM, Beaty JH, eds. Campbell's Operative Orthopaedics. 14th ed. Philadelphia, PA: Elsevier; 2021:chap 35.

Disclaimer

The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. No warranty of any kind, either expressed or implied, is made as to the accuracy, reliability, timeliness, or correctness of any translations made by a third-party service of the information provided herein into any other language. © 1997- A.D.A.M., a business unit of Ebix, Inc. Any duplication or distribution of the information contained herein is strictly prohibited.

##RemoveMe##
 
 
 
 

 

 
 

 
© 1997-ADAM Company Logo All rights reserved.