Do you sometimes feel very tired? At the same time, have you experienced strange symptoms such as joint pain, swollen fingers, and sometimes your fingertips turn pale and blue when exposed to cold? Are you also troubled by the symptoms of these diseases appearing all at once? Then this may be a rare condition called Mixed Connective Tissue Disease, or MCTD as we call it for short. Don't worry, let's talk about this simply.
What exactly is MCTD?
Simply put, MCTD is an autoimmune disorder. Think of it this way: our body's defense system, the immune system, is there to protect us from disease-causing germs. But in this type of disease, our own defense system mistakenly thinks our own healthy tissues are enemies and starts attacking them.
The uniqueness of MCTD is that it is not a single disease, but rather a combination of the symptoms of three other major connective tissue diseases. That is why it is called "Mixed". It is also called "overlap syndrome". The three diseases are:
- Systemic lupus erythematosus (SLE): We usually call this 'lupus'.
- Scleroderma: This causes the skin to thicken and harden.
- Polymyositis: This causes muscle weakness and swelling.
Some people may also show symptoms of conditions such as dermatomyositis, rheumatoid arthritis, or Sjögren's syndrome in addition to these symptoms.
What are the symptoms of MCTD?
Often, these symptoms don't all appear at once. They appear one after the other over time. Therefore, it can be difficult to initially diagnose MCTD.
| Symptom | A simple explanation |
|---|---|
| Feeling tired and lifeless | Constantly feeling extremely tired for no reason. Feeling as if your body is lifeless. |
| Body heat (fever) | It's not a high fever, just a slight body heat that persists. |
| Muscle and joint pain | Muscle aches and weakness, and swollen, stiff joints with pain. |
| Raynaud's phenomenon | This is a common symptom for many people. When exposed to cold or under stress, blood flow to the hands, feet, nose, and earlobes decreases, causing them to suddenly turn pale, then blue. Then they turn red again and return to normal. You may feel numbness or pain during this time. |
| Swelling of fingers | The fingers feel swollen and scaly. Sometimes this goes away after a few days, but over time, some people may develop a hardening of the skin that makes it difficult to bend their fingers (sclerodactyly). |
| Skin spots | Red or reddish-brown spots or lesions on the knuckles. |
How does MCTD feel when it flares up?
People with this disease can sometimes have very severe symptoms. We call this a 'flare-up'. During this time, joint pain and muscle aches can become unbearable. Just like someone with `Rheumatoid arthritis`, the joints can become swollen, stiff, and painful. `Raynaud's phenomenon` can also occur more frequently and more severely.
What causes MCTD?
The exact cause of this disease has not yet been found. It is not a disease that is directly inherited. However, research has found that if someone in the family has connective tissue diseases, others are at a certain risk of developing it. In addition, it is suspected that some viruses, exposure to chemicals such as `polyvinyl chloride` and `silica` may also cause this.
Who is most at risk of developing this disease?
MCTD is most common in women between the ages of 20 and 40. However, that doesn't mean that men or people of other ages can't get it. Anyone can get this disease at any age.
What are the possible complications of MCTD?
MCTD is a disease that can sometimes cause serious complications, so it is very important to keep the disease under control.
Remember, not everyone will develop all of these complications. Many of these can be prevented with proper treatment.
Here are some of the main complications:
- Pulmonary hypertension: This is the leading cause of death among MCTD patients. It occurs when the pressure in the blood vessels that carry blood to the lungs increases.
- Interstitial lung disease: Inflammation and scarring of the tissues of the lungs.
- Heart disease
- Kidney damage
- Digestive tract damage
- Anemia
- Tissue death (necrosis)
- Hearing loss
How does a doctor diagnose MCTD?
As we mentioned earlier, the symptoms of this disease can be difficult to diagnose because they appear gradually over time. It can take years to determine if it is MCTD. If you have these symptoms, you will likely be referred to a doctor who specializes in joint and autoimmune diseases, called a rheumatologist .
A doctor looks for four main things to suspect MCTD:
1. High levels of anti-U1-RNP antibodies in the blood: This is the main test for diagnosing MCTD.
2. No severe kidney or central nervous system problems: These problems can usually be severe in lupus (SLE) patients.
3. Presence of severe arthritis and pulmonary hypertension: These are rarely seen alone in lupus or scleroderma.
4. Raynaud's phenomenon and swelling of the fingers: These symptoms occur in only 25% of lupus patients.
What are the treatments for MCTD?
There is no cure for MCTD yet. But there are many effective treatments that can help you control your symptoms, prevent complications, and live a normal life. Treatment depends on factors such as the severity of your symptoms and which organs are affected.
| Drug type | Purpose of use |
|---|---|
| Corticosteroids | Ex: Prednisone. Reduce inflammation in the body and suppress the activity of the immune system. |
| Antimalarial drugs | E.g. Hydroxychloroquine. Prevent flare-ups and control mild symptoms. |
| Calcium channel blockers | Control Raynaud's phenomenon. These relax the muscles in the blood vessel walls. |
| Other immunosuppressants | If major organs (such as lungs, heart) are affected, tightly control the immune system. |
| Antihypertensive medications | Control pulmonary hypertension. |
What things can you do to take care of yourself?
In addition to taking medication, making small changes to your lifestyle can go a long way in helping to control these symptoms.
- Use of painkillers: For mild pain and swelling, you can take non-steroidal anti-inflammatory drugs (NSAIDs) like Ibuprofen, after consulting your doctor .
- Protecting yourself from the cold: This is essential to prevent Raynaud's phenomenon. Wear gloves and earflaps when going out in cold weather. Minimize contact with cold water and excessive refrigeration.
- Avoid smoking: Smoking constricts blood vessels. This can worsen Raynaud's. So if you smoke, it's very important to quit.
- Reduce stress: Stress can also trigger Raynaud's phenomenon. So try to calm your mind through things like breathing exercises and meditation. Seek the help of a mental health counselor if necessary.
When do you need to see a doctor?
If you have any of the symptoms we discussed earlier, especially if they are interfering with your daily activities, it's a good idea to see a doctor. If you have new muscle or joint pain, swelling in your fingers, or symptoms of Raynaud's, it's best to see a doctor to get them checked out.
Some questions you can ask the doctor:
* What is the cause of my symptoms?
* Do I have more than one connective tissue disease?
* What tests do I need to do?
* What are the treatments for this condition?
* What can I do to prevent flare-ups?
Living with this disease can be challenging at times. But with the right treatment and lifestyle, you can live well. Stay in touch with your doctor and talk openly about your concerns.
Take-Home Message
- MCTD is a complex, rare disease that causes symptoms of several diseases to come together.
- Because the symptoms appear one after another, it may take some time to accurately diagnose the disease.
- Although this disease cannot be completely cured, it is possible to control the symptoms, prevent complications, and live a normal life.
- Protecting yourself from the cold, avoiding smoking, and managing stress go a long way in reducing symptoms.
- Always talk to your doctor about your condition and continue with the appropriate tests and treatments. You are not alone!


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