Muscular dystrophy refers to a group of inherited muscle disorders characterized by progressive muscle weakness. It is caused by a genetic abnormality which affects the muscle structure and function which over time leads to increasing disability.Although there are over one hundred types of muscular dystrophy the most common types that usually present in childhood are:- Duchenne muscular dystrophy affects mainly boys and is the most severe and common form of muscular dystrophy.symptoms are usually apparent by age three..,Becker muscular dystrophy:-milder and less common than duchenne"s . symptoms may not present until age ten or eleven.
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