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Muscle dystrophy is a group of more than 30 genetic conditions that cause progressive muscle weakness and loss of muscle mass. The symptoms of muscle dystrophy vary depending on the type, but generally get worse over time. While there is currently no cure for any form of the disease, a variety of treatments can help to manage the condition and slow its progression. These include medications, physical therapy, and assistive devices. Research is ongoing to find new treatments and possible cures for muscle dystrophy.
| Characteristics | Values |
|---|---|
| Curability | Currently, there is no cure for any form of muscular dystrophy |
| Treatments | Corticosteroids, such as prednisone and deflazacort, can help with muscle strength and delay progression. Other treatments include low-impact aerobic exercise, physical therapy, occupational therapy, and mobility aids. |
| Types | There are over 30 types of muscular dystrophy, including Duchenne, Becker, Emery-Dreifuss, Facioscapulohumeral, Limb-girdle, Oculopharyngeal, Myotonic, and Congenital. |
| Symptoms | Muscle weakness and loss of muscle mass, trouble walking and using arms, shortening of muscles or tendons around joints, and difficulty breathing. |
| Causes | Genetic mutations that interfere with the production of proteins needed for healthy muscles. |
| Diagnosis | An electrode needle is inserted into the muscle to measure electrical activity during relaxation and contraction. |
| Progression | Muscular dystrophy symptoms tend to get worse over time, leading to loss of mobility and strength. |
| Research | Trials are ongoing for new treatments, including exon skipping and stem cell therapy. |
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What You'll Learn
Muscular dystrophy is incurable but treatable
Muscular dystrophy is a group of more than 30 genetic conditions that cause progressive muscle weakness and loss of muscle mass. It can be present at birth, develop in childhood, or even in adulthood. While there is currently no cure for any form of muscular dystrophy, treatments can help manage the condition and slow its progression.
The symptoms of muscular dystrophy vary depending on the specific type, but they generally include progressive muscle weakness and loss of muscle mass. Some common types of muscular dystrophy include Duchenne muscular dystrophy (DMD), Becker muscular dystrophy (BMD), myotonic dystrophy, and facioscapulohumeral muscular dystrophy (FSHD). DMD is the most common form and mainly affects boys, while BMD is the second most common and typically has milder symptoms. Myotonic dystrophy is the most common type diagnosed in adulthood and affects men and women equally. FSHD commonly affects muscles in the face, shoulders, and upper arms.
Treatments for muscular dystrophy aim to manage symptoms and slow the course of the disease. These treatments are tailored to the specific needs of the patient, as different types of muscular dystrophy can cause unique problems. Some common treatments include medications such as corticosteroids and newer drugs like eteplirsen (Exondys 51) and golodirsen (Vyondys 53), which have been approved by the FDA for treating certain types of muscular dystrophy. Heart medications may also be prescribed if the condition affects the heart.
In addition to medication, various therapies can be beneficial for people with muscular dystrophy. Physical therapy, including low-impact aerobic exercise, stretching, and strengthening exercises, can help maintain muscle strength, flexibility, and mobility. Occupational therapy can also improve independence by suggesting techniques and environmental changes. Additionally, assistive devices such as braces, canes, walkers, and wheelchairs can provide support and enhance mobility.
While there is currently no cure for muscular dystrophy, ongoing research provides hope for the future. Clinical trials are ongoing, focusing on treatments such as exon skipping, which aims to increase the production of muscle protein. Stem cell research is also being conducted to explore the possibility of regenerating damaged muscle tissue. These advancements show promise in the development of effective treatments for muscular dystrophy.
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There are over 30 types of muscular dystrophy
There are indeed over 30 types of muscular dystrophy, a group of genetic conditions that cause muscle weakness and other muscle-related symptoms. The symptoms of muscular dystrophy get worse over time, and the condition can be present at birth, develop in childhood, or develop in adulthood. The most common variety, Duchenne muscular dystrophy, usually occurs in young boys, but girls can also have a milder version. As Duchenne muscular dystrophy progresses, it affects the heart and lungs. The second most common type is Becker muscular dystrophy, which mainly affects boys, but girls can have milder symptoms. Symptoms of Becker muscular dystrophy can appear at any time between the ages of 5 and 60, but they typically start in the teenage years.
Myotonic dystrophy is the most common type of muscular dystrophy diagnosed in adulthood, affecting men and women equally. People with myotonic dystrophy have difficulty relaxing their muscles after using them, and the condition can also affect the heart and lungs. Congenital muscular dystrophies (CMD) are a group of muscular dystrophies that become apparent at or near birth, causing overall muscle weakness with possible joint stiffness or looseness. Depending on the type, CMD may also involve spinal curvature (scoliosis), breathing issues, intellectual disabilities, learning disabilities, eye issues, or seizures.
Distal muscular dystrophy affects the muscles of the hands, feet, lower arms, and lower legs. It tends to affect people in their 40s and 60s. Emery-Dreifuss muscular dystrophy (EDMD) mainly affects male children and young adults, causing muscle weakness in the shoulders, upper arms, and shins. EDMD also affects the heart and usually progresses slowly. Facioscapulohumeral muscular dystrophy (FSHD) most commonly affects the muscles in the face, shoulders, and upper arms. Limb-girdle muscular dystrophy (LGMD) affects the muscles in the upper arms, upper legs, shoulders, and hips and affects people of all ages. Finally, oculopharyngeal muscular dystrophy (OPMD) weakens the muscles in the eyelids and throat, with symptoms such as droopy eyelids and difficulty swallowing often appearing in the 40s or 50s.
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Symptoms include muscle weakness and loss of muscle mass
Muscular dystrophy (MD) is a group of more than 30 genetic conditions that cause muscle weakness and other muscle-related symptoms. The symptoms of muscular dystrophy get worse over time. It can be present at birth, develop in childhood, or start in adulthood. The most common form is Duchenne muscular dystrophy, which usually occurs in young boys. However, girls can also have a milder version of it.
The symptoms of muscular dystrophy can vary significantly depending on the type, but they generally worsen over time. The complications of progressive muscle weakness can include trouble walking, difficulty using arms and performing daily activities, and breathing problems. As the disease progresses, it can lead to a loss of mobility and independence. However, treatments such as medications, therapy, and assistive devices can help manage symptoms, slow the course of the disease, and improve quality of life.
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Diagnosis involves testing electrical activity in muscles
There is currently no cure for any form of muscular dystrophy, a group of more than 30 genetic conditions that affect muscle function. However, doctors can diagnose the condition through a variety of tests, including one that involves testing electrical activity in muscles. This test is called electromyography (EMG) and it measures the electrical activity of muscles and nerves.
During an EMG, a doctor will insert a tiny electrode needle into the muscle being tested. The patient will then relax and gently tighten the muscle, during which time the doctor will measure the electrical activity. In people with muscular dystrophy, the muscle fibres do not respond as well to repeated electrical stimulation as they do in healthy muscles. The results of an EMG can help doctors distinguish between conditions that begin in the muscle and nerve disorders that mimic muscular dystrophy.
A doctor may also perform a nerve conduction study to determine if there is any nerve damage. This test can help confirm a diagnosis of muscular dystrophy and determine the best treatment.
Genetic testing can also help confirm or rule out a diagnosis of muscular dystrophy. This type of medical testing identifies changes in a person's chromosomes, genes, or proteins. The results of these tests can help doctors make recommendations for appropriate medical management and provide information to inform other testing options. If genetic testing is unable to identify the type of muscular dystrophy, a doctor may recommend a muscle biopsy, which involves taking a small sample of muscle tissue to examine under a microscope.
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Treatment includes medication, therapy, and assistive devices
While there is currently no cure for any form of muscular dystrophy, treatments can help to manage the condition and extend the time a person with the disease can remain mobile. Treatment includes medication, therapy, and assistive devices.
Medication
Medications can help delay damage to muscles or minimize the symptoms of muscular dystrophy. Corticosteroids such as prednisone and deflazacort (Emflaza) can help with muscle strength and delay the progression of certain types of muscular dystrophy. However, prolonged use of these drugs can cause weight gain and weaken bones, increasing the risk of fractures. Newer drugs include eteplirsen (Exondys 51), the first medication approved by the FDA specifically to treat some people with Duchenne muscular dystrophy. In 2019, the FDA approved golodirsen (Vyondys 53) for the treatment of some people with Duchenne dystrophy who have a certain genetic mutation. Heart medications, such as angiotensin-converting enzyme (ACE) inhibitors or beta-blockers, can be used if muscular dystrophy damages the heart.
Therapy
Physical therapy can help keep muscles flexible and strong, with a combination of physical activity and stretching exercises recommended for people with muscular dystrophy. Physiotherapy can be useful for maintaining muscle strength, preserving flexibility, and preventing stiff joints. Speech therapy may also benefit patients who experience weakness in the facial and throat muscles, teaching them how to maximize their muscle strength.
Assistive Devices
Assistive devices can improve the quality and sometimes the length of life in people with muscular dystrophy. Braces can help keep muscles and tendons stretched and flexible, slowing the progression of contractures, as well as aiding mobility and function by providing support for weakened muscles. Mobility aids such as canes, walkers, and wheelchairs can help maintain independence and mobility. As respiratory muscles weaken, breathing assistance devices such as a sleep apnea machine or ventilator may be required to improve oxygen delivery during sleep or force air in and out of the lungs. Surgery may also be needed to correct contractures or spinal curvature that could make breathing more difficult.
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Frequently asked questions
No, there is currently no cure for any form of muscular dystrophy. However, there are treatments that can help manage the condition and slow its progression.
Treatments for muscle dystrophy include medications, physical therapy, and assistive devices. Corticosteroids can help improve muscle strength and delay the progression of certain types of muscular dystrophy. Low-impact aerobic exercise, such as walking and swimming, can help maintain strength and mobility. Braces, canes, walkers, and wheelchairs can also help with mobility and independence.
The symptoms of muscular dystrophy vary depending on the type but generally include progressive muscle weakness and loss of muscle mass. Some specific symptoms include trouble walking, difficulty using arms, shortening of muscles or tendons around joints, and respiratory problems.
There are more than 30 types of muscular dystrophy, including Duchenne muscular dystrophy (DMD), Becker muscular dystrophy (BMD), myotonic dystrophy, facioscapulohumeral muscular dystrophy (FSHD), and limb-girdle muscular dystrophy (LGMD). The type of muscular dystrophy is determined by a specific genetic mutation.
