You may have seen a child who was healthy, running around and playing, gradually having difficulty walking or talking, or their behavior gradually changing. As a parent, when they were doing well at first, and then feel like their child's abilities are deteriorating over time, it is difficult to put into words the fear and anxiety that you feel. The reason for this may be a rare disease that none of us have heard of. Today we are talking about a group of such diseases. That is leukodystrophy .
Simply put, what is leukodystrophy?
Leukodystrophy is not one disease. It is a group of diseases that affect our central nervous system (that is, the brain and spinal cord). Doctors are constantly discovering new things about it. Currently, about 52 types of this disease have been identified.
Many of these types of leukodystrophies are genetic . That is, they are inherited from parents to children. Sometimes the child can show symptoms right after birth. However, some children can be born with the gene defect associated with the disease, but in the early stages, they may appear completely healthy.
The important thing is that these conditions are progressive, meaning that a child who is initially healthy may develop symptoms later.
What are the symptoms of this disease?
All of these types of leukodystrophy have one thing in common: they damage the myelin sheath in the brain.
Imagine an electrical wire in our house. There is a plastic sheath around the copper wire in it, right? That is what allows the electricity to go exactly where it needs to go, without leaking. Similarly, our nerves have a white fatty sheath called 'myelin' around them. This myelin sheath is responsible for carrying nerve messages accurately and quickly to the brain and from the brain to the parts of the body. When this myelin sheath is damaged, our nervous system cannot function properly.
Each type of leukodystrophy damages this myelin sheath in different ways, so the problems children may experience can vary greatly.
| Area of symptoms | Common problems seen |
|---|---|
| Body balance and movement | Difficulty walking, frequent falls, inability to control the body. |
| Behavior and learning | Learning disabilities, memory loss, behavioral changes. |
| Growth and development | Failure to show age-appropriate development (e.g., delayed speech, walking). |
| Function of the senses | Gradual decline in hearing, vision, and the ability to speak. |
| Other nerve-related problems | Breathing difficulties, urinary control problems, seizures. |
For example, in a type called Canavan disease , the child's neck muscles are paralyzed, but their arms and legs remain rigid. They may also lose their vision and have seizures.
Sometimes symptoms appear at birth. But in a type like Refsum Disease , symptoms appear around the age of 20. Sometimes they can appear as early as the age of 50. Things like weakening of the retina, loss of hearing, and loss of smell can be seen in this.
Because the symptoms are so different, it can be a bit difficult to diagnose this disease.
Why does this kind of disease occur? What is the cause?
As we discussed earlier, many of these diseases are genetic conditions. This means that they are caused by a defect in the genes that come from either the mother or the father, or both.
But some types are not inherited. They are caused by a new genetic mutation. For example, Alexander disease does not appear to be inherited. This means that even if neither parent has the defective gene, a child can still develop it.
Therefore, while one child in the same family may have leukodystrophy, the other children may not have it.
If one of your children has leukodystrophy and you are expecting another child, it is very important to seek genetic counseling . This will help you understand this and the risk of having a future child with it. Talk to your doctor about this.
How do doctors accurately diagnose this disease?
Diagnosing this disease is a bit of a complicated process because the symptoms are so varied. Therefore, doctors have to perform several types of tests.
| Test type | Simply put... |
|---|---|
| Blood and urine tests | Identifying abnormalities in the body's chemical processes. |
| MRI scans | Obtaining very clear, detailed images of the brain and nervous system to check for damage to the myelin sheath. |
| CT scans | Another imaging test to detect changes in brain structure. |
| Genetic testing | Identifying the specific genetic defect that causes the disease. |
| Mental and intellectual tests | Testing the child's thinking, learning, and memory abilities. |
Is there a treatment for this?
In fact, there is still no definitive cure for most types of leukodystrophy. However, this does not mean that there is nothing that can be done.
During treatment, doctors focus on controlling symptoms and maintaining the child's quality of life as best as possible. Treatment depends on the type of leukodystrophy the child has.
Common treatments are:
- Administering medications to control symptoms (e.g., to control seizures).
- Special treatments, such as physical therapy, occupational therapy, and speech therapy , can help improve a child's mobility, ability to perform daily tasks, and speech.
- Some children may need extra help with learning and nutrition .
In some cases, a bone marrow transplant can slow or stop the progression of the disease. Scientists are also researching new treatments, such as gene therapy .
With all of this, the most important thing is to stay in touch with your doctor and follow his instructions.
Take-Home Message
- Leukodystrophy is a group of rare genetic diseases that damage the nerve covering (myelin sheath) in the brain.
- Even if a child is initially healthy, symptoms may gradually appear over time and the condition may worsen.
- If you notice an unexplained deterioration in your child's walking, speaking, vision, or behavior, see a doctor without delay.
- Although there is no specific cure for most types, there are treatments to manage symptoms and improve the child's quality of life.
- Talk openly with your doctor about any fears, doubts, or questions you have.
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