- Mostly affects
boys (rarely girls).
- Often brothers or male relatives
have same problem.
- First signs appear around ages
3 to 5: the child may seem awkward or clumsy,
or he begins to walk 'tiptoe' because he cannot
put his feet flat. Runs strangely. Falls often.
- Problem gets steadily worse over
the next several years.
- Muscle weakness first affects feet,
fronts of thighs, hips, belly, shoulders, and
elbows. Later, it affects hands, face, and neck
muscles
- Most children become unable to walk by age 10.
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- May develop a severe curve
of the spine.
- Heart and breathing muscles
also get weak
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