Does your newborn baby feel very limp, as if he or she is lifeless? Perhaps the baby's crying is very soft, and his or her limbs are moving less? If you notice something like this, you should be a little concerned. Because it could be a sign of a rare muscle disease called `(Congenital Muscular Dystrophy)`, or `(CMD)` for short, which is present at birth.
What is `(Congenital Muscular Dystrophy - CMD)`?
Simply put, Congenital Muscular Dystrophy is a group of diseases that cause muscle weakness that begins at birth or very soon after birth. The word 'congenital' means 'present from birth'. This is a chronic condition that is inherited, meaning it can be passed down from generation to generation. This causes the muscles to gradually weaken, and other symptoms may also appear. This muscle weakness may also increase over time.
What are the main types of `(CMD)`?
Now let's see, there are different types of this `(CMD)`. Doctors classify these types according to which genes are affected. Let's talk about a few of the main types:
- Laminin-alpha 2-related muscular dystrophies (LAMA2): This may affect between 10% and 37% of people with CMD. Children with this condition may not be able to walk at all in the early stages. They may also have difficulty speaking due to facial weakness and an enlarged tongue (macroglossia). About one-third of children may have seizures.
- Dystroglycanopathies (DGPs): This also occurs in 12% to 25% of cases. In addition to muscle weakness, this type can also affect your baby's brain. This can cause seizures, cognitive disabilities, and eye problems. Other types in this group include Walker-Warburg syndrome, muscle-eye-brain disease, and Fukuyama CMD (FCMD), which is most common in Japan.
- Collagen VI-related muscular dystrophies (COL6-RDs): This also occurs in 12% to 19% of cases. There are subtypes that range from mild to severe, such as Bethlem muscular dystrophy, intermediate COL6-RD, and Ullrich congenital muscular dystrophy (UCMD).
- Selenoprotein N-related myopathies (SEPN1-RM): This occurs in about 11% of cases. It is characterized by early onset muscle weakness affecting the muscles of the head and trunk (called the axial muscles). This can quickly lead to respiratory insufficiency.
How common is this `(CMD)` situation?
This is actually a very rare disease. According to researchers, it affects between 6 and 9 children out of a million worldwide.
What are the symptoms of `(CMD)`?
Okay, so what are the symptoms of a baby with `(CMD)`? The main one is muscle weakness. You may see things like this at birth or a few days after birth:
- Hypotonia: Some people call this a 'doll-like' feeling. It can feel like the limbs are hanging down.
- It is very rare to shake your limbs spontaneously.
- The crying sound is very slow and weak.
- It is difficult to drink milk due to difficulty sucking.
- Muscle and joint stiffness, contractures.
Shortly after birth, a baby's development of gross motor skills (things that involve large muscles) is also a symptom of CMD. For example, a delay in neck development, a delay in rolling over, and a delay in sitting, kneeling, standing, and walking. For example, if your baby is still struggling to do those things while other babies of the same age are running, jumping, and playing, that's something to consider.
The severity of this muscle weakness can vary from baby to baby. Depending on the type of `(CMD)`, your baby may also have additional symptoms such as:
- Eye problems: For example, nearsightedness (myopia), increased eye pressure (glaucoma).
- Drooping of the upper eyelid (ptosis).
- Brain abnormalities: such as lissencephaly (smoothing of the brain surface) or cerebellar malformations (deformities of the cerebellum).
- Seizures.
- Intellectual disability.
What are the possible complications of `(CMD)`?
What are the possible complications of `(CMD)`? This also varies depending on the type of `(CMD)`. But in general, things like this can happen:
- Mobility issues: Some children may not be able to walk at all and may need a wheelchair. Others may need assistive devices such as orthopedic braces or a walker to help them walk.
- Respiratory complications: A common complication of CMD is chronic respiratory failure. This is caused by weakness of the muscles that help with breathing. This may require mechanical ventilation (breathing machine). This can lead to conditions such as atelectasis and pneumonia.
- Cardiac complications: Cardiomyopathy is a common complication of CMD. This can lead to chronic heart failure.
- Musculoskeletal complications: Immobility can lead to scoliosis, a curved spine. There is also an increased risk of osteopenia and bone fractures. Pressure ulcers and joint contractures (tightening of the muscles and ligaments around a joint) can also occur.
- Neurological complications: Living with a chronic illness may make your child more likely to develop depression and/or anxiety.
Why does this `(Congenital Muscular Dystrophy)` occur?
This is caused by mutations in genes. These mutations occur in the genes that are responsible for building and maintaining healthy muscles in our bodies. Due to these genetic mutations, the cells that are supposed to maintain the baby's muscles are unable to do their job properly. As a result, the muscles gradually weaken over time.
There are many genes that contribute to muscle function, and there are many possible genetic mutations. That's why there are different types of muscular dystrophy and CMD.
Most cases of CMD are inherited in an autosomal recessive pattern. Simply put, this means that a child inherits a genetic mutation that causes the disease from both parents. This means that both parents may be carriers of the mutation, but they may not show symptoms. However, if the child inherits the mutation from both parents, the disease will develop.
Some cases of CMD occur spontaneously, meaning the gene mutation occurs randomly and is not inherited from a parent. This is called a de novo mutation.
How is CMD diagnosed?
If your baby has symptoms of Congenital Muscular Dystrophy (the main symptom is hypotonia), your doctor will first do a physical exam, a neurological exam, and a muscle exam. Your baby may also be referred to a pediatric neurologist for more in-depth testing.
If there is a suspicion of a condition called ``Congenital Muscular Dystrophy'', your doctor may recommend tests such as:
- Creatine kinase blood test: An enzyme called creatine kinase is released into the blood when muscles are damaged. So, if its level is high in the blood, it can be a sign of a muscle weakness disease.
- Electromyography (EMG): This test measures the electrical activity of your baby's muscles and nerves.
- Genetic tests: There are some genetic tests that can identify genetic mutations associated with muscular dystrophy. Comprehensive gene panels can confirm the specific type of CMD in about 60% of cases.
- Muscle biopsy: The doctor may take a small sample of your baby's muscle. A specialist will then look at it under a microscope to check for signs of muscle weakness.
- Echocardiogram and Electrocardiogram (EKG): These tests check to see if the condition (CMD) has affected your baby's heart muscle.
- Brain MRI scan: If possible, your doctor may recommend a brain MRI. Many types of CMD are associated with specific abnormalities in different parts of the brain.
These tests may seem like a lot to you. Watching your little one undergo these tests can be a very painful experience. But what you need to know is that doctors want to give your baby the right diagnosis and the best possible treatment. The symptoms of CMD can be similar to those of other diseases, such as some myopathies (muscle disorders), and other metabolic conditions, such as glycogen storage diseases and mitochondrial diseases. Therefore, it is very important to get an accurate diagnosis.
What are the treatments for `(CMD)`?
There is currently no cure for this condition (Congenital Muscular Dystrophy). However, researchers continue to try to find a cure.
The main goal of treatment is to control symptoms and improve your child's quality of life. Treatment options may vary depending on the type of CMD. These may include:
- Physical therapy and occupational therapy: The main goal of these therapies is to strengthen and stretch your child's muscles, which helps maintain mobility.
- Corticosteroids: Corticosteroids, such as prednisolone and deflazacort, can help delay muscle weakness, improve lung function, slow down scoliosis, slow the progression of cardiomyopathy, and prolong life.
- Mobility aids: Devices like canes, braces, walkers, and wheelchairs can help your child get around and help protect them from falls.
- Surgery: Your child may need surgery to relieve pressure on the tight muscles and correct the curvature of the spine (scoliosis).
- Heart care: Early treatment with medications such as ACE inhibitors and/or beta-blockers can slow the progression of cardiomyopathy and prevent heart failure. Devices called pacemakers can also help treat heart rhythm problems and heart failure.
- Speech therapy: This can help children who have difficulty speaking and/or swallowing.
- Respiratory care: Cough-assist devices and respirators can help with breathing. In cases of respiratory failure, a tracheostomy (insertion of a tube through a hole in the neck to help with breathing) and assisted ventilation may be necessary.
Your child may also be able to participate in a clinical trial for CMD. Talk to your child's medical team to see if this is an option for you.
Medical team treating `(CMD)`
There may be a team of specialists and healthcare workers working to manage your child's condition (CMD). These may include specialists such as:
- Pediatricians
- Pediatric neurologists
- Pediatric physiatrists (Physical Medicine and Rehabilitation Specialists)
- Geneticists
- Pediatric orthopaedists
- Pediatric physical therapists
- Pediatric occupational therapists
- Pediatric speech-language pathologists
- Pediatric cardiologists
- Pediatric pulmonologists
- Child psychologists
- Social workers
What will be the future of a baby with `(CMD)`?
It is difficult for researchers and doctors to predict the future (what we call the prognosis) of a baby with Congenital Muscular Dystrophy. Your child's medical team will give you as much information as possible about what to expect while your child is in their care.
In general, congenital muscular dystrophies tend to be more severe and develop more quickly than muscular dystrophies that begin in late childhood or adolescence.
The life expectancy of children with congenital muscular dystrophy depends on how quickly the condition worsens and which muscles are affected. The main causes of death from these conditions are respiratory or cardiac complications caused by muscle weakness.
Can `(CMD)` be avoided?
Since Congenital Muscular Dystrophy is a genetic disease, there is nothing you can do to prevent it as it currently stands.
Before you try to have a baby, if you are concerned about inheriting muscular dystrophy or another genetic condition, talk to your doctor about genetic counseling. In some cases, prenatal testing can detect the condition early in pregnancy.
How can I help my child with `(CMD)`?
If your child has Congenital Muscular Dystrophy, it is important that you advocate for them to make sure they receive the best medical care and as many therapeutic services as possible. By advocating for such care, you can help them have the best possible quality of life.
You and your family can also consider joining a support group where you can meet people who have gone through similar experiences. Places like these can provide you with mental strength, new information, and a lot to learn from the experiences of others.
When should my child with `(CMD)` see a doctor?
If your child has CMD, they should meet with their medical team regularly to receive treatment and monitor their symptoms. Don't miss follow-up appointments as your doctor recommends.
What questions should I ask my child's doctor?
When your child is diagnosed with CMD, it may be helpful to ask these questions:
- What type of `(CMD)` does my child have?
- What treatment do you recommend?
- What is the complete list of specialists my child should see?
- Do you maintain contact with other specialists?
- What can I do at home to improve my child's quality of life? (e.g. exercise, diet)
- Is there any new research on `(CMD)`?
- Are there any new clinical trials for CMD that my child may be eligible for?
- Can you recommend a support group?
The most important things we want to take home from this story are
It's normal to feel overwhelmed and anxious when your child is diagnosed with Congenital Muscular Dystrophy (CMD). But remember, your child's medical team will provide a strong, personalized management plan. It's important to make sure you, your child, and your family get the support they need, and to stay focused on your child's health. Your child's medical team is here to help you, your child, and your family through every step of the way. Don't worry, you're not alone.
` Congenital Muscular Dystrophy, CMD, muscle weakness, genetic disease, childhood diseases, hypotonia, muscle wasting, child health
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