Glycogen Storage Disease Type V
National Organization for Rare Disorders, Inc.
It is possible that the main title of the report Glycogen Storage Disease Type V is not the name you expected. Please check the synonyms listing to find the alternate name(s) and disorder subdivision(s) covered by this report.
- Glycogen Storage Disease Type V
- Glycogenosis Type V
- Myophosphorylase Deficiency
- GSD V
- Glycogen Storage Disease
- McArdle Disease
Glycogen storage disease type V (McArdle Disease or GSD-V) is one of several inherited glycogen storage diseases all of which are caused by failures of specific enzymes required for the storage of energy-supplying glycogen. In the case of GSD-V, symptoms are caused by the lack of the crucial enzyme muscle phosphorylase (myophosphorylase). This enzyme is needed for the breakdown of glycogen (the body's form of stored energy) into sugar (glucose) in muscle tissues. All of the glycogen storage diseases are characterized by the inability to break down glycogen, but in each case this occurs for a different reason. Unlike most of the other GSDs, type V has two autosomal recessive forms, a childhood-onset form and an adult-onset form. In addition, there is a much more rare autosomal dominant form of GSD-V. The clinical features of GSD-V are exercise intolerance, muscle cramping, and dark, burgundy-colored urine due to the presence of myoglobin (myoglobinuria).
CLIMB (Children Living with Inherited Metabolic Diseases)
176 Nantwich Road
Crewe, CW2 6BG
Association for Glycogen Storage Disease
P.O. Box 896
Durant, IA 52747
Vaincre Les Maladies Lysosomales
2 Ter Avenue
Muscular Dystrophy Association
3300 East Sunrise Drive
Tucson, AZ 85718-3208
NIH/National Institute of Diabetes, Digestive & Kidney Diseases
Office of Communications & Public Liaison
Bldg 31, Rm 9A06
31 Center Drive, MSC 2560
Bethesda, MD 20892-2560
Association for Glycogen Storage Disease (UK) Ltd
Old Hambledon Racecourse
Sheardley Lane, Droxford
Hampshire, SO32 3QY
Genetic and Rare Diseases (GARD) Information Center
PO Box 8126
Gaithersburg, MD 20898-8126
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It is possible that the title of this topic is not the name you selected. Please check the Synonyms listing to find the alternate name(s) and Disorder Subdivision(s) covered by this report
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Last Updated: 5/27/2008
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