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Muscular dystrophy (MD) refers to a group of more than 30 inherited diseases that cause muscle weakness and muscle loss. Some forms of MD appear in infancy or childhood, while others may not appear until middle age or later. The different muscular dystrophies vary in who they affect and the symptoms. All forms of MD grow worse as the person's muscles get weaker. Most people with MD eventuallylose the ability to walk.
There is no cure for muscular dystrophy. Treatments include physical and speech therapy, orthopedic devices, surgery and medications. Some people with muscular dystrophy have mild cases that worsen slowly. Other cases are disabling and severe
What Is Muscular Dystrophy?
Muscular dystrophy (MD) is a genetic disorder that weakens the muscles that help the body move. Peoplewith MD have incorrect or missing information in their genes, which prevents them from making the proteins they need for healthy muscles. Because MD is genetic, people are born with the problem — it's not contagious and you can't catch it from someone who has it.
MD weakens muscles over time, so children, teens, and adults who have the disease can gradually lose the ability to do the things mostpeople take for granted, like walking or sitting up. Someone with MD might start having muscle problems as a baby or their symptoms might start later. Some people even develop MD as adults.
Several major forms of muscular dystrophy can affect teens, each of which weakens different muscle groups in various ways:
Duchenne (pronounced: due-shen) muscular dystrophy(DMD), the most common type of thedisease, is caused by a problem with the gene that makes a protein called dystrophin. This protein helps muscle cells keep their shape and strength. Without it, muscles break down and a person gradually becomes weaker. DMD affects boys. Symptoms usually start between ages 2 and 6. By age 10 or 12, kids with DMD often need to use a wheelchair. The heart may also be affected, and people with DMDneed to be followed closely by a lung and heart specialist. They can also develop scoliosis (curvature of the spine) and tightness in their joints. Over time, even the muscles that control breathing get weaker, and a person might need a ventilator to breathe. People with DMD usually do not survive beyond their late teens or early adulthood.
Becker muscular dystrophy (BMD), like DMD, affects boys.The disease is very similar to DMD, but its symptoms may start later and can be less severe. With BMD, symptoms like muscle breakdown and weakness sometimes don't begin until age 10 or even in adulthood. People with BMD can also have breathing, heart, bone, muscle, and joint problems. Many people with BMD can live long, active lives without using a wheelchair. How long a person with BMD can livevaries depending on the severity of any breathing and heart problems.
Emery-Dreifuss (pronounced: em-uh-ree dry-fuss) muscular dystrophy (EDMD) typically starts causing symptoms in late childhood to early teens and sometimes as late as age 25. EDMD is another form of muscular dystrophy that affects mostly boys. It involves muscles in the shoulders, upper arms, and shins, and it often causes jointproblems (joints can become tighter in people with EDMD). The heart muscle may also be affected.
Limb-girdle muscular dystrophy (LGMD) affects boys and girls equally, weakening muscles in the shoulders and upper arms and around the hips and thighs. LGMD can begin as early as childhood or as late as mid-adulthood, and it often progresses slowly. Over time, a wheelchair might be necessary to getaround. There are many different types of LGMD, each with its own specific features.
Facioscapulohumeral (pronounced: fa-she-o-skap-you-lo-hyoo-meh-rul) muscular dystrophy (FSHD) can affect both guys and girls, and it usually begins during the teens or early adulthood. FSHD affects muscles in the face and shoulders and sometimes causes weakness in the lower legs. People with this type of MD might...