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Adam MP, Feldman J, Mirzaa GM, et al., editors. GeneReviews® [Internet]. Seattle (WA): University of Washington, Seattle; 1993-2024.

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Table 3.

Porphyria Classification Systems

Hereditary PorphyriaPrimary Symptom-Based
Porphyria Classification
Organ-Based Porphyria
Classification
Acute intermittent porphyria (AIP)NeurologicHepatic
ALA dehydratase deficiency porphyria (ADP)NeurologicHepatic
Congenital erythropoietic porphyria (CEP)CutaneousErythropoietic
Erythropoietic protoporphyria (EPP)CutaneousErythropoietic
Hepatoerythropoietic porphyria (HEP)CutaneousHepatic/erythropoietic
Hereditary coproporphyria (HCP)Neurologic (cutaneous possible but rare)Hepatic
Porphyria cutanea tarda (PCT)CutaneousHepatic
Variegate porphyria (VP)Cutaneous & neurologicHepatic
X-linked protoporphyria (XLP)CutaneousErythropoietic

ALA = aminolevulinic acid

From: Familial Porphyria Cutanea Tarda

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