Does your child have these symptoms? Let's learn about Morquio Syndrome!

Have you recently noticed any abnormalities in your little one's development or any changes in their bones? Sometimes you may be worried because you can't figure out what these are. Today we are going to talk about one such rare but very important medical condition. That is a condition called Morquio Syndrome.

What is Morquio Syndrome? Let's understand it simply!

Okay, let's see what Morquio Syndrome is. It's also called Mucopolysaccharidosis IV (MPS IV). Simply put, it's a genetic condition that affects the development of our bones, and the symptoms gradually increase over time. "Genetic" means that it's something we inherit from our parents.

The main reason for this condition is that our bodies cannot properly break down large sugar molecules called glycosaminoglycans (GAGs) (formerly known as mucopolysaccharides). This happens because the body does not have enough enzymes to do the job. Think of these enzymes as little workers in our bodies who do all the work. If they are missing, some things will not work properly.

What are the main types of Morquio Syndrome?

There are two main types of Morquio syndrome. Although the symptoms of both types are largely similar, the genetic factors that cause them are different.

• Type A: This is caused by a deficiency in the enzyme N-acetyl-galactosamine-6-sulfatase (GALNS).
• Type B: This is caused by a deficiency in the enzyme beta-galactosidase (GLB1).

Since the treatment for both types can be different, it is very important to identify exactly which type you have.

How common is this condition?

Morquio Syndrome is actually a relatively rare condition. In a country like the United States, statistics show that it affects about one in 200,000 to 300,000 people. Of these, 95% are reported to be type A Morquio Syndrome cases.

What are the symptoms of Morquio Syndrome?

Symptoms of Morquio syndrome usually begin to appear during infancy to early childhood. These symptoms tend to increase gradually over time. These symptoms mainly affect the skeleton. Let's see what they are:

• Facial features become a little rough.
• Flexible joints.
• Abnormalities in the development of the spine, chest, ribs, hips, and wrists. You've probably seen some children with some curvature of the spine. Things like that.
• Knock knees (genu valgum). It looks like the knees are bent inward.
• The cervical vertebrae are not positioned properly. This is called an odontoid process anomaly.
• Short stature. That is, not having a height appropriate for one's age.
• Scoliosis or kyphosis.

In addition to the skeleton, this condition can also affect other parts of the body. Some of the symptoms include:

• Blurred vision and decreased vision. Sometimes the white part of the eye, such as the iris, may appear blurry.
• Dental problems due to thinning of tooth enamel.
• Enlarged liver (hepatomegaly).
• Hearing loss and frequent ear infections.
• The occurrence of hernias.
• Pain in areas where there are abnormalities in bone growth.
• Snoring and sleep apnea.
• Frequent upper respiratory tract infections.

The most important thing to remember is that Morquio Syndrome does not affect a child's intelligence.

However, some serious symptoms of this condition can be life-threatening. These include:

• Airway obstruction.
• Compressing the spinal cord can cause conditions such as paralysis.
• Abnormalities of the heart valves.

What causes Morquio Syndrome?

Morquio Syndrome is also caused by a genetic cause. This condition occurs when a child inherits two genetic mutations (that is, from both the mother and father) in either the GALNS (type A) gene, which we discussed earlier, or the GLB1 (type B) gene.

These genes produce the enzymes that break down the sugar molecules called glycosaminoglycans (GAGs) that we mentioned earlier. When there is a mutation in the genes, these enzymes do not receive the instructions they need to work properly. That is, their activity is greatly reduced, or they disappear altogether.

What happens then? Those sugar molecules (GAGs) start to accumulate in places inside cells called lysosomes. Lysosomes are like places inside cells where unwanted things are broken down and recycled. This is why Morquio Syndrome is also called a lysosomal storage disorder .

Although this accumulation of sugar molecules affects various tissues and organs, it most commonly affects the bones. This is why symptoms are mainly seen in the bones.

Who can this condition affect?

Morquio Syndrome is a genetic condition that can affect anyone. It is inherited only if the affected gene is inherited from both parents (autosomal recessive inheritance).This means that for a child to have this condition, both parents must be carriers of this gene. However, even if they are carriers, the parents will not show these symptoms.

How is Morquio Syndrome diagnosed?

The condition is usually diagnosed when symptoms become apparent, which is in early childhood. Your child's doctor will first do a physical examination and may order an X-ray to look at the bones. In addition, the doctor may order several other tests:

• Urine test: This checks for elevated levels of glycosaminoglycans in the child's urine.
• Blood test: This can identify the gene causing the symptoms and see how the relevant enzyme is functioning in the body.

What are the treatments for Morquio Syndrome?

Sadly, there is no cure for Morquio Syndrome. However, there are a variety of treatments that can help control the symptoms and make life easier for the child. Some of them include:

• Cornea replacement - penetrating keratoplasty.
• Enzyme Replacement Therapy (ERT) for Morquio syndrome type A. This involves administering the deficient enzyme externally.
• Physical therapy: This helps improve the child's mobility.
• Surgery: Surgery may be performed to free the compressed bones, stabilize the vertebrae and spinal cord in the neck, and remove the tonsils and adenoids to open up the airway.
• Use of a wheelchair or other assisted mobility devices.
• Use of hearing aids or ventilation tubes.

What can I expect if my child has Morquio Syndrome?

The symptoms of Morquio syndrome may not be severe at first. However, you should expect the symptoms to gradually increase as your child grows. But don't worry, treatment can help your child be more comfortable and prevent serious, life-threatening consequences.

What is the average lifespan of someone with Morquio Syndrome?

This is a really difficult question to answer. The life expectancy of someone with Morquio Syndrome varies depending on the severity of the disease.Your child's healthcare provider will explain this to you based on your child's condition. Symptoms such as difficulty breathing and spinal cord compression are the main factors that can lead to early death.

Children with severe symptoms may live into adolescence. Those with less severe symptoms may live into middle age, perhaps into their 60s.

Can Morquio Syndrome be prevented?

Morquio Syndrome is a genetic condition, so there is no way to prevent it. However, if you or someone in your family has this genetic condition, or if you have concerns about it before you have a child, you can talk to your doctor about genetic counseling and genetic testing. This will help you understand your risk of having a child with a genetic condition.

When should I see a doctor?

Symptoms that affect the spinal cord and respiratory tract are the most serious. Therefore, it is important to pay attention to such things quickly. If your child is having difficulty breathing, or if they are showing signs of paralysis, go to the hospital immediately.

Always pay attention to your child's symptoms, especially after surgery, and watch for signs of infection (e.g., pain, swelling, pus). If you notice any of these, see your doctor immediately.

What questions should I ask my doctor?

It's a good idea to ask your child's doctor questions like these:

• Does my child need physical therapy to improve their mobility?
• Will my child need surgery to correct bone growth abnormalities?
• What type of Morquio Syndrome does my child have?
• Will my child have to use a wheelchair to get around?

Finally, things to remember (Take-Home Message)

It can be very difficult to know that your child has a genetic condition that could shorten their life span. It's understandable. You should always give your child lots of love and support. Because this condition affects their bones, it can be difficult for them to walk and play with other children their age. However, using assisted mobility devices can give your child some freedom to participate in childhood activities.

If you notice that your child is missing developmental milestones related to vision or hearing, tell your doctor right away. This can help prevent your child from falling behind in schoolwork. If your child shows signs of difficulty breathing or a loss of consciousness, go to the hospital immediately.

Living with a condition like this is a challenge, but proper medical advice, treatment, and your love will be a great strength for your child to live the best life possible.

` Morquio Syndrome, MPS IV, genetic diseases, bone development, enzymes, glycosaminoglycans, pediatrics