Did Your Newborn Develop Unexplained Spots or Heart Concerns? Here is What You Need to Know About Neonatal Lupus

Noticing red spots on your newborn baby's skin can feel very scary. Hearing a doctor mention an unusual heart rate adds even more worry. These changes might sometimes point to a condition known as neonatal lupus. Let us talk about this condition in clear, simple terms, just like chatting with a trusted friend.

Neonatal lupus is a rare medical condition that affects some babies before or right after birth. While the name sounds alarming, most signs are completely temporary and harmless. Understanding what happens inside your baby's body helps you feel much more prepared and confident.

Your baby's medical care team will guide you through every single step. Always follow their expert advice and ask questions whenever you feel unsure. Let us walk through everything you need to know about neonatal lupus together.

What Is Neonatal Lupus?

Simply put, neonatal lupus is a medical condition seen in fetuses during pregnancy or in infants right after birth. Most of the time, it causes temporary and harmless skin changes. These skin spots usually fade away completely before the baby turns one year old. However, neonatal lupus can sometimes affect a baby's heart.

The most serious complication that can happen is called autoimmune congenital heart block. This means neonatal lupus interferes with the normal electrical impulses of the baby's heart. If a severe heart block occurs, it can become dangerous, but doctors have effective ways to treat and manage it.

If your doctor tells you that your baby has neonatal lupus, the most important step is following your medical team's instructions. They will explain exactly how this diagnosis affects your baby and what treatments might be necessary.

Is It Connected to Adult Lupus?

Please do not confuse neonatal lupus with systemic lupus erythematosus, which is the type of lupus adults get. These two conditions are very different, with completely separate causes and treatment plans.

Neonatal lupus happens when certain proteins called antibodies pass from the mother to the baby through the placenta. These specific antibodies include anti-SSA, anti-SSB, or anti-U1-RNP. Antibodies are proteins your immune system makes, but sometimes they mistakenly attack healthy cells.

These antibodies only affect babies whose mothers carry these specific immune proteins. Usually, this means the mother has an autoimmune disease. Examples include Sjogren syndrome, systemic lupus erythematosus, or mixed connective tissue disease. Sometimes, mothers have these antibodies without showing any symptoms at all.

Having an autoimmune disease does not mean your baby will automatically develop neonatal lupus. In fact, most babies born to mothers with these antibodies do not get neonatal lupus. However, this is an important topic to discuss openly with your doctor during your prenatal visits.

How Common Is This Condition?

Neonatal lupus is quite rare. The most serious complication, which is autoimmune congenital heart block, affects less than two percent of babies born to mothers who test positive for anti-SSA, anti-SSB, or anti-U1-RNP antibodies.

However, if a previous pregnancy was affected by autoimmune congenital heart block, the chance of it happening again in a future pregnancy is higher. Your doctor will monitor your pregnancy very closely if you have a history of this condition.

What Are the Signs of Neonatal Lupus?

The clearest sign of neonatal lupus is a skin rash. You might notice this rash when the baby is born or during the first few months of life. This rash is temporary and completely harmless. It typically looks like circular rings with darker edges, often red, and clear skin right in the middle.

You will most commonly see these rashes on your baby's scalp and face. They can also appear on the chest, arms, and legs. This rash looks very similar to a skin condition called subacute cutaneous lupus, which is how neonatal lupus got its name.

There are other temporary and harmless signs that can occur as well. These include:

• Low red blood cell counts, known as anemia.
• Low platelet counts, which help your blood clot normally.
• Low white blood cell counts, known as neutropenia.
• Higher levels of liver enzymes in the blood.
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Every single one of these signs will disappear once the maternal antibodies leave your baby's body completely. These symptoms usually clear up on their own between six and nine months of age.

Neonatal Lupus and Heart Block.

As we mentioned earlier, neonatal lupus can cause a serious complication called autoimmune congenital heart block. This is a problem with the electrical system of the baby's heart. Electrical impulses travel through the heart to control its beating rhythm. When a baby has neonatal lupus, maternal antibodies attack a specific cluster of cells called the AV node that manages these electrical signals.

Sometimes this only causes minor changes to the baby's heartbeat, which is called first- or second-degree heart block. These minor blocks can even reverse shortly after birth. However, other babies develop third-degree heart block, which is also known as complete heart block.

When this happens, electrical signals cannot pass from the upper chambers of the heart to the lower chambers. This makes the heartbeat irregular and makes it hard for the baby's heart to pump enough blood to the body. Third-degree heart block is the most severe form and can sometimes be life-threatening before or after birth.

Heart block usually develops between the eighteenth and twenty-fourth weeks of pregnancy. Doctors can detect this during pregnancy by listening to the fetal heartbeat. If the heart rate is slower than expected, known as bradycardia, it can be a sign of heart block.

What Causes Neonatal Lupus?

As discussed, neonatal lupus is caused by maternal antibodies that travel across the placenta to the baby. Researchers have linked these specific types of antibodies to neonatal lupus:

• Anti-Sjogren syndrome-related antigen A, also called anti-SSA or Ro.
• Anti-Sjogren syndrome-related antigen B, also called anti-SSB or La.
• Anti-U1 ribonucleoprotein, also called anti-U1-RNP.

These antibodies are found in people with autoimmune diseases like Sjogren syndrome, systemic lupus erythematosus, rheumatoid arthritis, and mixed connective tissue disease. However, people with no symptoms or prior diagnosis can also carry these antibodies.

When these antibodies enter the baby's body, they can cause temporary or permanent changes. Researchers do not yet fully understand how these antibodies trigger these changes. However, they know that the most severe and permanent changes happen to the baby's heart.

Once inside the heart tissue, these antibodies start an inflammatory process that leads to scar tissue. This scar tissue blocks the pathway for electrical signals, stopping the baby's heart from working correctly. In severe cases, this can threaten health during pregnancy or cause dangerous complications after birth.

How Do Doctors Diagnose Neonatal Lupus?

Doctors diagnose neonatal lupus during pregnancy or right after the baby is born. If a doctor notices that the baby's heart rate is slower than normal, they will perform a fetal echocardiogram. This is a safe, painless, and noninvasive test that uses sound waves to check the structure and function of the baby's heart.

The fetal echocardiogram can reveal changes that suggest neonatal lupus. If this happens, your doctor will discuss the severity of the condition and what you can expect moving forward. They will also test your blood for those specific antibodies.

Sometimes, signs of neonatal lupus, such as skin rashes, do not appear until after the baby is born. If this happens, the medical team will perform a physical exam and rule out other causes for the rash. They may test your blood, your baby's blood, or both for antibodies to confirm the diagnosis.

Your doctor will make a clear diagnosis of neonatal lupus if these two criteria are met:

• You, your baby, or both test positive for anti-SSA, anti-SSB, or anti-U1-RNP antibodies.
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And

• Your baby has at least one confirmed sign of neonatal lupus.

How Is Neonatal Lupus Treated?

Treatment depends entirely on how severe the condition is. Babies who only have skin rashes, abnormal blood counts, or elevated liver enzymes do not need any medical treatment at all. These issues go away on their own within the first year of life.

However, babies born with heart block may need a permanent pacemaker placed shortly after birth or later in childhood. This medical device helps regulate their heart rate so it beats normally. Your baby's medical team will provide detailed information about this procedure.

Some research shows that taking certain medicines during pregnancy can help lower the risk of heart block in the baby. If you have a diagnosed autoimmune disease or test positive for these specific antibodies, your doctor may recommend taking hydroxychloroquine during pregnancy. This medicine can help protect your baby from the most serious effects of neonatal lupus.

What Is the Outlook for Babies with Neonatal Lupus?

Your baby's outlook depends entirely on how neonatal lupus affects their body. Babies who only have skin, liver, or blood abnormalities have an excellent outlook. Everything should return to normal health between six and nine months of age.

However, if heart block develops, the outlook changes greatly. Heart block can sometimes be life-threatening before or after birth. Most babies with heart block will need a permanent pacemaker during childhood.

A small number of children who had neonatal lupus develop other autoimmune conditions later in life. These conditions can include:

• Juvenile idiopathic arthritis.
• Psoriasis.
• Autoimmune thyroid disease.
• Type 1 diabetes.

"Every child is unique. Neonatal lupus may impact your child's life very little or not at all. Their medical team will tell you what you can expect and how to prepare."

Can Neonatal Lupus Be Prevented?

There is currently no way to stop antibodies from passing through the placenta during pregnancy. However, you can take steps to prevent severe heart damage in your baby and plan ahead for any needed treatments. If you test positive for anti-SSA, anti-SSB, or anti-U1-RNP antibodies, your doctor may recommend:

• Taking specific medicines during pregnancy to help protect your baby from developing heart block.
• Having regular fetal echocardiograms starting around the sixteenth week of pregnancy to check for heart block.
• Monitoring your baby's heart function during their first month of life to catch any delayed signs of heart block, as some babies show no symptoms for several weeks after birth.

When to Seek Medical Advice

Always follow your child's medical team schedule for checkups and appointments. They will tell you how often your child needs follow-up visits to monitor their health.

Taking care of your own health is also very important. Even if you test positive for these antibodies without having symptoms of an autoimmune disease, your doctor may refer you to a rheumatologist. This is a doctor who specializes in joint and autoimmune conditions. This referral is important because you have a higher chance of developing an active autoimmune disease over the next few years. Your doctor will monitor you closely so you can start treatment right away if needed.

Questions to Ask Your Baby's Doctor.

After a neonatal lupus diagnosis, asking these questions can help you understand the condition better:

• How will neonatal lupus affect my pregnancy and my baby?
• What treatment choices do we have?
• What is the long-term outlook for my baby?
• Could neonatal lupus affect any future pregnancies?

Do Adults Get Neonatal Lupus?

No, adults never get diagnosed with neonatal lupus. This condition is only diagnosed in fetuses and infants. Neonatal lupus is not the same illness as adult lupus.

Systemic lupus erythematosus is an autoimmune condition that affects both children and adults. It is a systemic disease, meaning it affects the entire body and requires lifelong medical care and monitoring.

Neonatal lupus only affects babies during their first few months of life. It is not something that develops later in childhood or adulthood.

However, even though neonatal lupus goes away after infancy, it can cause long-term effects. The most severe complication, which is heart block, requires a lifetime pacemaker. Some research also suggests that babies born with neonatal lupus might have a higher risk of developing an autoimmune disease later in life.

If you had neonatal lupus as an infant, talk with your doctor about what kind of ongoing checkups or tests you might need as you grow up.

Receiving a neonatal diagnosis during pregnancy can bring many worries and stressful thoughts. Not knowing what will happen as your pregnancy continues is very difficult. Sharing your fears and questions with your medical team is completely okay. They want to support you, explain what is happening, and help you have a healthy pregnancy.

If your baby receives a diagnosis after birth, they may need heart monitoring during their first month of life. They might also have skin rashes that last for a few months. Your baby's medical care team will explain what to expect and support your family every step of the way.

Things to Remember From Our Discussion.

Let us review the most important facts about neonatal lupus:

• Neonatal lupus happens in newborns because of specific antibodies passed from the mother.
• It is not the same disease as adult systemic lupus erythematosus.
• Most babies only experience temporary, harmless skin rashes that heal within six to nine months.
• Some babies can develop congenital heart block, which may require a pacemaker.
• If the mother has an autoimmune disease or specific antibodies, discussing this with a doctor during pregnancy is vital.
• Most babies recover completely, and treatments are available for heart complications.
• Never hesitate to ask your doctor any questions. They are always there to help you and your baby.

Sources & References:
1. Cleveland Clinic. Neonatal Lupus: Causes, Symptoms & Treatment. Available online.
2. Mayo Clinic. Neonatal Lupus Overview - Symptoms and Causes. Available online.
3. NHS UK. Lupus and Pregnancy Guidance. Available online.
4. Centers for Disease Control and Prevention (CDC). Autoimmune Conditions in Pregnancy. Available online.
5. National Institutes of Health (NIH) / PubMed Central. Clinical signs and Management of Neonatal Lupus. DOI: 10.1016/j.clinthera.2021.05.002.