Autosomal recessive erythropoietic protoporphyria in the United Kingdom: prevalence and relationship to liver disease.

E rythropoietic protoporphyria (EPP; MIM 177000) is an inherited disorder of haem biosynthesis characterised by the onset in early childhood of lifelong acute photosensitivity of sun-exposed skin. It results from partial deficiency of ferrochelatase (FECH; E.C., which leads to accumulation of protoporphyrin IX in erythrocytes, plasma, skin, and… (More)