porphyria due to ALA dehydratase deficiency (MONDO_0013000, a Monarch Disease Ontology identifier) is a hepatic porphyria caused by biallelic variants in ALAD (in an autosomal recessive inheritance pattern). This is an extremely rare form of hepatic porphyria characterized by neuro-visceral attacks, nausea, vomiting, diarrhea, neuropathy, and abdominal pain without cutaneous manifestations. Because the disease is so rare, inducible triggers are not well-documented. Also known as: ALAD Porphyria, ALAD porphyria, ALAD-related hepatic porphyria, ALAD-related porphyria, acute hepatic porphyria, porphyria due to ALAD deficiency, porphyria due to delta-aminolevulinate dehydratase deficiency, porphyria of Doss.