NCIt definition : A rare congenital metabolic disorder characterized by an inborn error of porphyrin-heme
biosynthesis. It is caused by deficiency of the enzyme ferrochelatase. Signs and symptoms
include painful cutaneous photosensitivity leading to blistering and scarring of the
exposed skin areas, erythrodontia, red discoloration of urine, hemolytic anemia, and
splenomegaly.;