Fibrous Dysplasia: Learn about this rare bone-weakening disease

Have you ever thought about a bone pain that you just feel? We often don't think much about the strength of our bones. But imagine, a strong bone in your body slowly dissolves from the inside, and instead is filled with something like threadlike, scar tissue. That's the kind of condition we're talking about today, Fibrous Dysplasia. This is a somewhat rare disease. Don't worry, we'll talk about everything simply and clearly.

Simply put, what is Fibrous Dysplasia?

Fibrous Dysplasia is when our healthy, strong bone tissue is replaced by abnormal, fibrous (scar-like) tissue. In other words, where there should be real bone, a weaker, stringy tissue is replaced. What happens? Because the new tissue is not as strong as real bone, the bone becomes very weak. This makes it more likely to break (fracture) easily .

Although this condition can occur in any bone in the body, it is most commonly seen in the following places:

• Femur
• Shin bone (tibia)
• Ribs
• Skull and facial bones
• Upper arm bone (humerus)

But here's the important thing to remember. Fibrous Dysplasia is a non-cancerous (benign) condition. That means it doesn't spread from one bone to another. That's a big relief, isn't it?

There are two main types of Fibrous Dysplasia:

Doctors classify this disease according to how many bones in the body are affected. Accordingly, there are two main types.

What are the symptoms of this disease? How do you recognize it?

One of the surprising things about Fibrous Dysplasia is that some people can have it without any symptoms . Imagine you're having an X-ray for something else and it's discovered by accident.

But if symptoms do appear, they may be like this:

• Bone pain: This is the main symptom. It's just a dull, aching pain that keeps coming from the same spot. Sometimes this pain can get worse when walking or lifting weights.
• Fractures: As mentioned earlier, because bones are weak, bones can sometimes break easily, even with a minor fall or a hard blow.
• Bone shape changes: As the abnormal tissue grows, the bone may appear swollen. This can cause a slight bowing in the case of a leg, or a slight change in the shape of the face in the case of a facial bone.
• Painless swelling of the ribs may occur.
• If the spine is affected, a curvature of the spine (scoliosis) may occur.
• If the bones of the skull are affected, things like bulging eyes, a change in the position of the jaw bones, teeth moving, and nasal congestion can occur.

Why is this happening?

This is caused by a mutation in a gene called GNAS1 in our body. This happens after a child is conceived in the womb. Due to this gene mutation, the function of cells called osteoblasts, which help in bone growth, is disrupted. That is when that weak, fibrous tissue starts to form instead of healthy bone.

Doctors still don't know exactly what causes this genetic mutation.

How does a doctor find this?

When you go to see a doctor with persistent bone pain, he will first examine you carefully. He will ask you a lot of questions, such as where the pain is, how long it has been there, and how it feels. Then, he may do several tests to confirm the diagnosis.

• Blood or urine tests: These check for certain enzyme levels in the body. Sometimes, elevated levels of these enzymes can be a sign of abnormal tissue growth in the body.
• Imaging tests: These are the most important.
• X-ray: An X-ray can easily detect abnormalities, fractures, and changes in the shape of bones.
• CT scan or MRI scan: These can provide a clearer, more detailed picture of the bone and surrounding tissues.
• Biopsy: If the doctor is still in doubt, they will take a very small piece of the abnormal tissue under anesthesia and examine it under a microscope. This can confirm the disease with 100% certainty.

What are the treatments for this?

Treatment for Fibrous Dysplasia depends on your symptoms, the severity of the condition, and how it affects your life. There is no one-size-fits-all treatment.

The main treatment methods are:

1. Observation: If you have no symptoms or pain, your doctor may not prescribe any medication, but simply ask you to come back for a check-up every now and then. This means observing to see if there are any changes in your condition.

2. Medication: Certain medications (especially bisphosphonates) can be given to help strengthen bones and prevent fractures. These can also reduce bone pain.

3. Bracing: If this condition occurs in a bone, especially in a growing child's leg, special braces may be recommended to help the bone grow properly and prevent curvature.

4. Surgery:

• If a bone breaks (fractures), surgery will be required to fix it.
• If the bone is very weak, misshapen, and causing severe pain, the abnormal tissue can be removed and replaced with a healthy bone graft or metal rods can be inserted to strengthen the bone.

When should you see a doctor?

If you have persistent bone pain for no apparent reason , don't ignore it. Definitely see a doctor and talk about it.

If you already know you have Fibrous Dysplasia, talk to your doctor immediately if you:

• If you feel like your symptoms are getting worse.
• If you feel like your current treatments are not helping.

Emergency!

Because Fibrous Dysplasia weakens the bones, you are more likely to break a bone than others. Therefore, if you fall suddenly, hit a bone hard, or are involved in a car accident, go straight to the Emergency Department (ETU) of the nearest hospital without delay. Because even if it doesn't look like it from the outside, there may be a fracture inside.

How to live with this disease?

There is no single answer to this question, as Fibrous Dysplasia affects each person differently. But one thing is certain: it is a chronic, lifelong condition that cannot be cured .

But there is no need to be afraid or sad about it. This is not a fatal disease. With proper treatment and management, the impact this disease has on your life can be largely controlled. You may not even need any treatment. Even if treatment is needed, today's medical methods can help you control pain, prevent fractures, and live a normal, happy life.

If you have this disease, talk openly with your doctor to understand what to expect going forward based on your condition and what treatments are best for you.

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