What is porphyria?
Porphyria is a group of inherited disorders caused by the abnormal production of a substance in the body called heme. Most types of porphyria are inherited in an autosomal dominant pattern, which means a child needs to inherit the defective gene from only one parent to develop the disease.
Heme is found in all body tissues but especially in the liver and red blood cells. Multiple enzymes are required for your body to convert chemical compounds called porphyrins into heme. If any of the enzymes are abnormal, the process cannot continue and porphyrins may build up in the body and be excreted in the urine or stool.
Signs and symptoms of porphyria depend on which specific enzymes are affected but often involve the nervous system or skin. Two major types include:
A diagnosis of porphyria may be confirmed by special blood, urine or stool tests that measure enzyme levels. There is no cure for porphyria. Treatment depends on the type of porphyria and may include heme therapy and medications to manage signs and symptoms. Severe attacks may require hospitalization.
Last Updated: 03/15/2006
© 1998-2014 Mayo Foundation for Medical Education and Research (MFMER). All rights reserved. A single copy of these materials may be reprinted for noncommercial personal use only. "Mayo," "Mayo Clinic," "MayoClinic.com," "Mayo Clinic Health Information," "Reliable information for a healthier life" and the triple-shield Mayo logo are trademarks of Mayo Foundation for Medical Education and Research.
Terms and conditions of use