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Duchenne Muscular Dystrophy (DMD) is a progressive disease involving muscular degeneration and weakness. DMD is mostly found in boys, but rarely there will be a girl who is diagnosed. Symptoms appear usually between ages 3-5. Symptoms at onset include weakness in the hips, pelvic area, thighs and shoulders. Later the skeletal muscles in the arms, legs and trunk are affected. Many boys have enlarged calves. By the early teen years patients' heart and respiratory muscles will be affected.
DMD is caused by the absence of dystrophin, a protein that helps keep muscle cells intact. Becker Muscular Dystrophy (BMD) is a milder version of DMD and its onset appears in the teen and early adult years. BMD takes a slower, less predictable course. ...
This solution of 443 words defines the characteristics of Duchenne Muscluar Dystrophy and explains it progression. It also touches on the accommodations provided for children with DMD. References used are included.