| | What are the muscular dystrophies?
The muscular dystrophies are a group of muscle disorders which have three features in common: they are hereditary; they are progressive; and each produces a characteristic selective pattern of weakness of muscle groups.
At what age do signs of muscular dystrophy appear?
At any age but most often in young people. The Duchenne type is usually first noticed in toddlers, the Becker type in childhood or adolescence, others in adolescence or early adulthood.
Does the rate of progression vary?
Some muscular dystrophies progress more rapidly than others. Also people with the same sort of muscular dystrophy may have different rates of progression even within a family.
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