About Erythropoietic Protoporphyria
Erythropoietic protoporphyria (EPP) is a rare inherited disorder that causes the skin to become painful when exposed to sunlight. This condition affects the production of heme in the body, which is needed for red blood cells to carry oxygen throughout the body.
Symptoms of EPP include the feeling of tingling or burning skin with sun exposure, leading up to severe pain. The skin may turn red and become edematous (swell with fluid). Treatment includes avoiding or protection from sunlight and managing complications.
Common early symptoms of erythropoietic protoporphyria (EPP) include:
- Skin pain upon exposure to the sun
- Redness and swelling of the skin
- Burning sensation
- Blistering and crusting of the skin
As EPP progresses or becomes more severe, additional symptoms may occur. Over time, the condition can lead to scarring and thickening of the skin. This can result in a more persistent and chronic redness and swelling of the affected areas. In some cases, there may be changes in skin pigmentation, such as darkening or lightening of the skin.
Diagnosis of erythropoietic protoporphyria (EPP) usually occurs in infancy or early childhood due to its symptoms. To diagnose EPP, healthcare providers may perform a variety of examinations, tests, and procedures. These may include:
- Laboratory tests: A sample of blood will be checked for increased levels of protoporphyrin.
- Genetic tests: A genetic test will be done to confirm the presence of variant FECH gene. The doctor may recommend genetic testing for other family members as well.
The primary goals of treatment for erythropoietic protoporphyria are to manage symptoms and prevent complications. Treatment options may include:
- Sun protection: The mainstay of treatment for EPP is to protect the skin from exposure to sunlight and certain types of artificial light. This can be achieved by wearing protective clothing, such as long sleeves, wide-brimmed hats, and sunglasses. Sunscreen with a high sun protection factor (SPF) should also be used.
- Oral beta-carotene: Beta-carotene is a type of pigment that can help increase the skin's tolerance to light. It is commonly used as a supplement in the treatment of EPP. Beta-carotene works by absorbing excess light energy and preventing it from causing damage to the skin cells.
- Hormone therapy: Afamelanotide is a synthetic hormone that stimulates the production of melanin, a pigment that provides some protection against UV light. Afamelanotide is administered as an implant under the skin and can increase the amount of time EPP patients can spend in sunlight without experiencing symptoms.
Other therapies may be needed depending on individual factors, such as levels of iron and protoporphyrin the blood. People with EPP should have close monitoring (check-ups with the doctor) to detect changes in their condition or complications that may require treatment.
The natural progression of erythropoietic protoporphyria (EPP) over time can vary from person to person. EPP may cause liver-related complications in approximately 20% of cases. These complications can include:
- Liver damage
- Cirrhosis (scarring of the liver)
- Liver failure
- Increased risk of liver cancer
- Anemia
Overall, while there is no cure for EPP, early diagnosis and appropriate management can help improve quality of life and minimize complications associated with the condition. If you suspect you or someone you know may have EPP or experience symptoms related to this condition, it's important to consult a healthcare professional for proper evaluation and guidance tailored to individual needs.