Does your little one have these symptoms? Let's talk about Blau Syndrome.

Does your little one often get rashes? Or do you say that his joints hurt? Does his eyes sometimes get red and his vision seems a little blurry? Although one or two of these things may occur, sometimes all of them can occur together. Today we are going to talk about a rare but very important medical condition to be aware of. That is Blau Syndrome .

What is Blau Syndrome?

Simply put, Blau Syndrome is a rare inflammatory disease that affects your child's skin, joints, and eyes . 'Inflammation' means swelling and redness inside the body. The main cause of this condition is a genetic mutation that the child is born with . Often, symptoms such as skin rashes, joint pain, or arthritis begin before the child is 5 years old . It can also cause a condition called uveitis, which affects vision.

What does the name "Blau Syndrome" mean?

When you hear this name, you might be wondering what this is. Let's take a look at what these two words mean:

• Blau: This is actually the name of a doctor. In 1985, Dr. Edward Blau, a former pediatrician in Wisconsin, published a research paper on this syndrome. He described a family that had suffered from the disease for four generations.
• Syndrome: In medicine, a syndrome is a condition in which several related symptoms come together and affect different parts of the body. That is, a combination of symptoms rather than a single disease.

What are the symptoms of Blau Syndrome?

Symptoms of Blau syndrome usually begin in infancy . Most often, these symptoms become apparent by the age of 5. They mainly affect your child's skin, joints, and eyes .

Skin symptoms

The first sign of Blau syndrome is a skin condition called granulomatous dermatitis. This is a rash that appears on the skin. It usually appears on the arms, legs, or other areas of the body, such as the chest and abdomen, within the first year of a child's life . This type of dermatitis can cause symptoms such as:

• Hard lumps or nodules that you can feel under your child's skin . These are called granulomas.
• The skin becomes like coral .
• Red, yellow, or brown blisters on the top layer of the child's skin, the epidermis.Bumps appear.

Symptoms in the joints

Blau syndrome can cause inflammation of the lining of your child's joints, called the synovium. Your child may develop arthritis in areas such as the hands, wrists, feet, and ankles between the ages of 2 and 4. Symptoms of arthritis include:

• Joint pain .
• Musculoskeletal pain , especially in the tendons.
• Joint swelling or stiffness .

Imagine if your little one cries when he wakes up in the morning, unable to move his limbs, or if he constantly complains that his joints hurt when he goes to play, you need to be concerned about that.

Eye symptoms

About 80% of children diagnosed with Blau syndrome develop an eye condition called uveitis. Uveitis is an inflammation of the middle layer of the eye, called the uvea. It can affect the child's retinas and optic nerves. A child can have uveitis in both eyes , and it can also cause vision loss . Symptoms of uveitis include:

• Low vision .
• You see small black dots (eye floaters ) moving around in front of your eyes.
• You feel pain or pressure in your eyes .
• Redness of the eyes .
• Photosensitivity , meaning it becomes difficult to see light.
• Eye swelling .

How does Blau Syndrome affect other parts of the body?

Although this is very rare, your child with Blau syndrome may develop potentially life-threatening inflammatory conditions in these organs:

• Blood vessels
• Brain
• Heart
• Liver
• Lymph nodes (lymphatic system)
• Spleen

What are the possible complications of Blau Syndrome?

The inflammatory condition caused by Blau syndrome can lead to complications such as:

• Cataracts, glaucoma, cystoid macular edema, retinal detachment, and complete loss of vision.
• Difficulty moving and permanent flexion of the affected joint.
• Kidney disease and kidney failure .
• Heart inflammation.
• Enlarged spleen.
• Neuropathy - nerve problems.
• Pulmonary hypertension - high blood pressure in the lungs.
• Vasculitis - inflammation of the blood vessels.

What causes Blau Syndrome?

The main cause of Blau syndrome is a mutation in the NOD2 gene . In most healthy people, this NOD2 gene produces a protein called NOD2. This protein helps our immune system fight germs and infections. However, if your child has Blau syndrome, this NOD2 protein becomes overactive . This changes the way the immune system works, causing severe inflammation that affects the child's eyes, skin, and joints.

Who is at risk of developing Blau Syndrome?

If one parent has Blau syndrome (or the gene mutation that causes it), the child has a 50% chance of inheriting the altered gene and developing the syndrome . The child must inherit one of the altered genes to develop the disease. This means that it is a genetic condition that belongs to a group called autosomal dominant disorders. Sometimes, a child can inherit this gene mutation and not develop Blau syndrome. However, the child has a 50% chance of passing the altered gene on to their children in the future.

What kind of doctors diagnose and treat Blau Syndrome?

Depending on your child's symptoms, he or she may need treatment from a team of specialists, including:

• A rheumatologist (a doctor who specializes in joint diseases) for arthritis and joint-related problems .
• A dermatologist (skin specialist) for skin diseases .
• An ophthalmologist (eye specialist) for vision problems .

How do doctors diagnose Blau Syndrome?

Tests to diagnose Blau syndrome vary depending on your child's symptoms. A genetic test (blood test) may be done to identify the NOD2 gene mutation that causes Blau syndrome. Your child may also have one or more of the following tests:

• An eye exam: This may include tests such as optical coherence tomography (OCT) and visual field testing.
• Imaging tests : MRI scan, CT scan, ultrasound, or X-rays to look at joints and other organs depending on the symptoms.
• Skin biopsy : Taking a small piece of skin for examination.

Can prenatal tests detect Blau Syndrome?

Prenatal tests such as chorionic villus sampling or amniocentesis do not specifically test for the NOD2 gene mutation.

What are other names for Blau Syndrome?

Your child's doctor may also call Blau syndrome by one of these names:

• Pediatric granulomatous arthritis
• Arthrocutaneous uvular granulomatosis
• Familial granulomatosis
• Familial juvenile systemic granulomatosis
• Granulomatous inflammatory arthritis, dermatitis and uveitis

How rare is Blau Syndrome?

Blau syndrome is a very rare disease. Worldwide, it affects less than one in a million children .

How do doctors treat Blau Syndrome?

Your child's medical team will try to treat various conditions to reduce symptoms and prevent disease flare-ups. Treatment options vary depending on the condition and its severity. They may include:

• Immunosuppressants : Drugs such as corticosteroids, methotrexate, and tumor necrosis factor (TNF) inhibitors.
• Anti-inflammatory drugs : Drugs like nonsteroidal anti-inflammatory drugs (NSAIDs).
• Eye medications and/or eye surgery for cataracts and glaucoma .
• Physical therapy and occupational therapy treatments .

What is the future of someone with Blau Syndrome?

Although there is no specific cure for Blau syndrome, treatment can control symptoms and give your child a good quality of life into adulthood.It can help. The way this condition affects everyone is different. One study found that 40% of children with Blau syndrome had mild symptoms and were able to be as active as other children their age. However, about 10% of children develop severe symptoms. If Blau syndrome affects major organs in the body, it can shorten a person's life expectancy .

Can Blau Syndrome be prevented?

If you or your partner has the gene mutation that causes Blau syndrome, it's a good idea to see a genetic counselor before having children. This specialist can talk to you about the risk of your future offspring inheriting the altered NOD2 gene.

When should I see a doctor?

See a doctor immediately if your child has any of the following:

• If you have difficulty holding things, bending your joints, or moving .
• If there is severe pain .
• If you have vision problems .

What should I ask my doctor?

You can ask your doctor questions like these:

• What causes my child to develop Blau Syndrome?
• What medications and treatments can help my child?
• Should my husband/wife and I undergo genetic testing?
• Should I watch out for signs of complications?

What is the difference between Blau Syndrome and Early-Onset Sarcoidosis?

Blau syndrome and early-onset sarcoidosis are actually the same disease , with the same symptoms. However, children with Blau syndrome inherit the gene change that causes the disease. Children with early-onset sarcoidosis do not have a family history of Blau syndrome. This means that the NOD2 gene changes or mutates sporadically , for no apparent reason. This is called a de novo gene mutation.

Finally, things to remember

Caring for a child with a chronic condition like Blau Syndrome can be challenging. If you have Blau Syndrome, you may be able to use your personal experience to better support your child. You can also use your experience to help your child live with this lifelong condition. The most important thing is to seek treatment from a specialist who is familiar with the arthritis, uveitis, and skin conditions associated with Blau Syndrome. They can help your child manage their symptoms and help them have the best possible childhood. If you notice any symptoms, don't ignore them. See a doctor right away.Blau Syndrome, Pediatrics, Skin Diseases, Arthritis, Uveitis, Genetic Diseases, NOD2 Gene