Porphyria

What Is Porphyria?

Porphyria is a group of disorders that can cause nerve or skin problems. There's no cure, but you can get treatments that will help you manage your symptoms.

If you have porphyria that affects your skin, you'll hear your doctor call it a "cutaneous porphyria." When the condition causes a problem with your nervous system, it's called "acute porphyria."

Porphyria Causes

No matter what kind of porphyria you have, it has the same root cause: a problem with how your body makes a substance called heme. Heme is part of the "hemoglobin" in your blood -- proteins that carry oxygen from the lungs to the rest of your body.

Heme has iron and gives blood its red color. It's made in your liver and bone marrow -- the spongy center of your bones. A variety of enzymes play a role in the process.

If you have porphyria, your body doesn't have enough of some of these enzymes. This shortage leads to a buildup of certain chemicals, called porphyrins, that help make heme.

The type of porphyria you have is linked to the specific enzyme that your body lacks.

Most types of porphyria are inherited. That means one or both of your parents passes a mutated gene to you that leads to the disease.

One common type of cutaneous porphyria, known as porphyria cutanea tarda, is sometimes passed through genes but can also be what doctors call an "acquired disease." In that case, certain conditions or actions can trigger symptoms of porphyria. These triggers can be things like:

Episodes of acute porphyria, which rarely happen before puberty, can be set off by taking some kinds of drugs, including:

Other things that might trigger acute porphyria are:

  • Fasting
  • Smoking
  • Drinking alcohol
  • Infections
  • Menstrual hormones
  • Stress
  • Being in the sun

Symptoms of Porphyria

Symptoms are different depending on the type of porphyria.

Symptoms of acute porphyria

The symptoms of acute porphyria can develop quickly and last for days or weeks. You might have an imbalance of salt in your body along with this type of porphyria.

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The symptoms can include:

You may notice changes in your personality, or you may get depression or other mental disorders. You could also feel agitated, confused, or get seizures.

Some complications you could get are:

Symptoms of cutaneous porphyria

Symptoms of cutaneous porphyria happen when your skin is in sunlight. The most commonly affected areas include the face and the back of the:

  • Hands
  • Forearms
  • Ears
  • Neck

You may get symptoms on your skin such as:

Porphyria Diagnosis

Doctors sometimes find it tricky to diagnose porphyria because the symptoms are similar to those of other diseases. If your doctor thinks you have it, they may order blood, urine, and stool tests to get a diagnosis. The best time for you to do these tests is when you have an outbreak of symptoms or around that time.

Sometimes you'll get multiple tests to help your doctor figure out which specific type of porphyria you have.

Your doctor may also suggest you get a genetic test. Since porphyria often runs in families, your doctor may recommend that others in your family get this test as well.

Questions for your doctor

  • What caused my porphyria?
  • Which type do I have?
  • What tests do I need?
  • How can I avoid my triggers?
  • Which treatments do you recommend?
  • How can I protect my skin from the sun?

 

Porphyria Treatment

When you have an outbreak of acute porphyria symptoms, you may need to stay in the hospital. You'll get medicine for pain, nausea, and vomiting. Your doctor may prescribe givosiran (Givlaari), which helps reduce the toxins linked to the attacks.

You may also need to get a type of sugar called glucose, which you might take by mouth or get put into your veins through an IV. Your doctor may also give you a shot of hemin (Panhematin).

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If you have cutaneous porphyria, your treatment will depend on the specific type of the disease you have and how severe your symptoms are.

If you have porphyria cutanea tarda, your treatment might include:

Your doctor may suggest that you avoid anything that triggers an outbreak. They will also treat conditions you have that bring on porphyria, like HIV or hepatitis C.

Doctors for porphyria

There are many things you can do to prevent outbreaks and manage your symptoms. You will likely need care from a team of health care professionals. You might see:

  • Hematologists, doctors who treat blood diseases
  • Dermatologists, specialists in skin diseases
  • Hepatologists, doctors who treat liver diseases
  • Genetic counselors, who advise people about their risk for inherited diseases

It may take time to find the right doctors, because porphyria is so rare. The American Porphyria Foundation (APF) can help you find a specialist in your area.

Good nutrition is another important part of taking care of yourself when you have porphyria. Your doctor or dietitian will help you get the right balance of carbohydrates and nutrients in your meals.

Porphyria Complications

Complications of acute porphyria

Acute porphyria can be life-threatening. Complications can include:

Complications of cutaneous porphyria

Cutaneous porphyria can lead to permanent skin damage. Complications of it can include:

  • Infection
  • Discoloration
  • Fragile skin
  • Scars

Porphyria Outlook

How porphyria affects you depends on the type you have. Acute porphyria symptoms start quickly and last for a few days or weeks. Severe attacks of acute porphyria can sometimes cause nerve damage and muscle weakness that can take months to get better.

Since cutaneous porphyria symptoms start when your skin is in sunlight, staying out of the sun will heal your skin and help prevent permanent damage.

Porphyria is a chronic disease, which means symptoms come and go throughout your life. Avoiding your triggers will help prevent bouts of symptoms.

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Remember that everyone with porphyria is different. Some people have milder symptoms than others.

Treatments can help you feel better and prevent complications.

Keep in mind that researchers are always testing new treatments in clinical trials. Ask your doctor if you should consider joining one.

Getting porphyria support

When you're managing porphyria, just as with any other serious medical problem, it's important to reach out to family and friends. They can give you the emotional backing you need and also help with everyday tasks while you get treatment.

Your medical team can also offer information and support. They may know about support groups that let you meet others with your condition.

Also, check the website of the American Porphyria Foundation. The group hosts patient education sessions where you can learn more about managing your symptoms. It also offers support for caregivers.

WebMD Medical Reference Reviewed by Arefa Cassoobhoy, MD, MPH on July 15, 2020

Sources

SOURCES:

National Human Genome Research Institute: "Learning about Porphyria."

Rare Diseases Clinical Research Network: "Porphyria Overview," "Treatment and Prevention," "Acute Intermittent Porphyria," "Frequently Asked Questions," "Frequently Asked Questions About the Porphyrias."

American Porphyria Foundation: "Porphyria Cutanea Tarda," "Congenital Erythropoietic Porphyria (CEP)," "Variegate Porphyria (VP)," "Hepatoerythropoietic Porphyria (HEP)," "ALAD-Deficiency Porphyria (ADP)," "About Porphyria," "Genetics," Finding a Doctor, "Support and Assistance."

Genetic and Rare Diseases Information Center: "Porphyria Cutanea Tarda."

Cleveland Clinic: "Porphyria."

American Osteopathic College of Dermatology: "Porphyria Cutanea Tarda."

Mayo Clinic: "Porphyria.”

National Institute of Diabetes and Digestive and Kidney Diseases: "Porphyria."

National Organization for Rare Disorders: "Acute Intermittent Porphyria."

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