Is hepatoerythropoietic porphyria a homozygous form of porphyria cutanea tarda Inheritance of uroporphyrinogen decarboxylase deficiency in a Spanish family

Abstract
A patient with hepatoerythropoietic porphyria (HEP) is described. He was shown by a family study to be homozygous for a gene that causes greater than 95% suppression of erythrocyte uroporphyrinogen decarboxylase activity.