Myoclonus with epilepsy with ragged red fibers
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MERRF is a disorder characterized by myoclonus, which is often the first symptom, followed by generalized epilepsy, ataxia, weakness, and dementia. Symptoms usually first appear in childhood after normal early development but symptoms can also first occur in adulthood. Symptoms vary widely from individual to individual and the course may be slowly progressive or rapidly downhill. Other common findings include hearing loss, short stature, optic atrophy, and cardiomyopathy with Wolff-Parkinson-White (WPW) syndrome. The diagnosis is based on clinical features and a muscle biopsy finding of ragged red fibers (RRF) [2]. The condition is caused by mutations - that can be detected with genetic testing in 90% of affected individuals - in the mitochondrial gene called MT-TK. The seizure disorder is treated with conventional anticonvulsant therapy. Coenzyme Q10 and L-carnitine are often used in hopes of improving mitochondrial function.[1]
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- More Detailed Information (Found: 4 Resources)
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- General
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The National Institute of Neurological Disorders and Stroke (NINDS) collects and disseminates research information related to neurological disorders. Click on the link to view information on this topic.
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The Online Mendelian Inheritance in Man (OMIM) database contains genetics resources that discuss Myoclonus with epilepsy with ragged red fibers. Click on the link to go to OMIM and review these resources.
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PubMed is a searchable database of medical literature and lists journal articles that discuss Myoclonus with epilepsy with ragged red fibers. Click on the link to view a sample search on this topic.
- Management Guidelines
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GeneReviews provides current, expert-authored, peer-reviewed, full-text articles describing the application of genetic testing to the diagnosis, management, and genetic counseling of patients with specific inherited conditions. Click on the link to view the article on this topic.
- Support Groups (Found: 7 Resources)
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United Mitochondrial Disease Foundation
8085 Saltsburg Road Suite 201
Pittsburg PA 15239
Toll-free: 1-888-317-UMDF
Phone: 412-793-8077
Fax: 412-793-6477
E-mail: info@umdf.org
Web site: http://www.umdf.org
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Mitochondria Research Society
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Muscular Dystrophy Association (MDA)
3300 East Sunrise Drive
Tucson, AZ 85718-3208
Phone: 1-800-FIGHT-MD (1-800-344-4863); 520-529-2000
Fax: 520-529-5300
Email: mda@mdausa.org
Web site: www.mdausa.org
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The National Organization of Rare Disorders (NORD) has partnered with Inspire.com to launch an online community for people with rare diseases called The NORD Rare Disease Community. This community connects medical patients, family members, caregivers, and professionals. Click on The NORD Rare Disease Community to learn more.
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RareShare is an online social hub dedicated to patients, families and healthcare professionals affected by rare medical disorders. Click on RareShare to learn more.
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ClinicalTrials.gov lists trials that are studying or have studied Myoclonus with epilepsy with ragged red fibers. Click on the link to go to ClinicalTrials.gov to read descriptions of these studies.
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You can submit a question to Ask the Mito DocSM , a service of the United Mitochondrial Diseases Foundation. Information contained in Ask the Mito DocSM is for informational and educational purposes only.
http://www.umdf.org/site/c.dnJEKLNqFoG/b.3042115/
- Testing
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GeneTests lists laboratories offering clinical genetic testing for this condition. Clinical genetic tests are ordered to help diagnose a person or family and to aid in decisions regarding medical care or reproductive issues. Talk to your health care provider or a genetic professional to learn more about your testing options.
- Scientific Conferences (Found: 2 Resources)
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United Mitochondrial Disease Foundation Annual Symposium , June 24, 2009 - June 27, 2009
Description: The objectives of this symposium are to (1) describe the latest findings regarding mitochondrial diseases; (2) share research findings and award new research grants; (3) explore the clinical manifestations of mitochondrial disorders, including diagnosis and treatment considerations, and understand the concepts of mitochondrial disease therapy; and (4) evaluate the links between mitochondrial disease and a host of more well-known diseases.
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