raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:100924

Porphyria due to ALA dehydratase deficiency

Synonyms: ALAD porphyria · Porphyria due to ALAD deficiency · Porphyria due to delta-aminolevulinate dehydratase deficiency · Porphyria of Doss

Type
Disease
Group
Disorder
Inheritance
Autosomal recessive
Age of onset
Adolescent, Childhood
Status
active

A rare acute hepatic porphyria characterized by neurovisceral attacks without skin symptoms.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enPorphyria due to ALA dehydratase deficiencyALAD porphyria · Porphyria due to ALAD deficiency · Porphyria due to delta-aminolevulinate dehydratase deficiency · Porphyria of Doss
frPorphyrie par déficit en ALA déshydratasePorphyrie de Doss · Porphyrie par déficit en ALAD · Porphyrie par déficit en delta-aminolévulinate déshydratase
dePorphyrie durch ALA-Dehydratase-MangelALAD-Porphyrie · Doss-Porphyrie · Porphyrie durch ALAD-Mangel · Porphyrie durch delta-Aminolävulinsäure-Dehydratase-Mangel
esPorfiria por deficiencia de ALA-deshidratasaALAD · Porfiria ALAD · Porfiria de Doss · Porfiria por deficiencia de delta-aminolevulínico-deshidratasa
itPorfiria da deficit di ALA deidratasiPorfiria da ALAD · Porfiria da deficit di ALAD · Porfiria da deficit di delta-aminolevulinico deidratasi · Porfiria di Doss
nlPorfyrie door deficiëntie van ALA-dehydrataseALAD-porfyrie · Porfyrie door ALAD-deficiëntie · Porfyrie door deficiëntie van delta-aminolevulinaatdehydratase · Porfyrie door deficiëntie van delta-aminolevulinezuurdehydratase · Porfyrie van Doss
ptPorfiria por deficiência de ALA desidratasePorfiria de Doss
plPorfiria z powodu niedoboru dehydratazy ALAPorfiria ALAD · Porfiria Doss · Porfiria z powodu niedoboru ALAD · Porfiria z powodu niedoboru dehydratazy kwasu delta-aminolewulinowego
csPorfyrie způsobená deficitem ALA hydratázyALAD porfyrie · Dossova porfyrie · Porfyrie způsobená ALA deficitem · Porfyrie způsobená deficitem delta-aminolevulonát dehydratázy
ukПорфірія внаслідок дефіциту ALA-дегідратазиПорфірія ALAD · Порфірія внаслідок дефіциту ALAD · Порфірія внаслідок дефіциту дельта-амінолевулінатдегідратази · Порфірія Досса
zh氨基乙酰丙酸脱水酶缺乏性卟啉症δ-氨基乙酰丙酸脱水酶缺乏性卟啉症
trALA dehidratasyon eksikliğine bağlı porfiriALAD porfiri · Doss Porfiri · ALAD eksikliğine bağlı porfiri · Delta-aminolevulinat dehidrataz eksikliğine bağlı porfiri

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM612740Evalidated
ICD-10E80.2NTBTattributedvalidated
ICD-115C58.1YNTBTindexvalidated
MONDO0013000Evalidated
UMLSC0268328Evalidated

E exact · NTBT this ORPHAcode is narrower than the target · BTNT broader than the target · ND not decided.

3

Classification

Preferential parent (Orphanet linearisation):

Parents in the classifications (1):

  • ORPHA:95157Acute hepatic porphyria
    rare inborn errors of metabolism; rare genetic diseases; rare neurological diseases; rare hepatic diseases; rare skin diseases; rare renal diseases; rare transplant-related disorders

No children.

4

Genes

1 direct
GeneAssociationStatusHGNCEnsemblOMIMLocusNameSource of validation
ALADDisease-causing germline mutation(s) inAssessedHGNC:395ENSG000001482181252709q32aminolevulinate dehydratase2063868[PMID]_16343966[PMID]
5

Prevalence and incidence

1 record
TypeClassValueAreaQualificationValidationSource
Point prevalence<1 / 1 000 000—EuropeClass onlyNot yet validatedORPHANET

Value is Orphadata's ValMoy: the mean estimate per 100 000 for prevalence and incidence, the number of cases or families for case reports.

6

HPO phenotypes

43 annotations · validated 2021-05-17
HPOTerm (as annotated by Orphanet)Diagnostic
Very frequent (99-80%)
HP:0012379Abnormal enzyme/coenzyme activity
Frequent (79-30%)
HP:0002027Abdominal pain
HP:0010472Abnormal circulating porphyrin concentration
HP:0030272Abnormal erythrocyte enzyme activity
HP:0000707Abnormality of the nervous system
HP:0012187Increased erythrocyte protoporphyrin concentration
HP:0033010Increased fecal coproporphyrin 3
HP:0012217Increased urinary porphobilinogen
HP:0001324Muscle weakness
HP:0009830Peripheral neuropathy
HP:0040322Purple urine
Occasional (29-5%)
HP:0003270Abdominal distention
HP:0100852Abnormal fear/anxiety-related behavior
HP:0002086Abnormality of the respiratory system
HP:0000713Agitation
HP:0006466Ankle flexion contracture
HP:0000739Anxiety
HP:0000741Apathy
HP:0000717Autism
HP:0001289Confusion
HP:0002019Constipation
HP:0031258Delirium
HP:0000716Depression
HP:0002014Diarrhea
HP:0001260Dysarthria
HP:0002572Episodic vomiting
HP:0007159Fluctuations in consciousness
HP:0004302Functional motor deficit
HP:0001288Gait disturbance
HP:0000738Hallucinations
HP:0000365Hearing impairment
HP:0002902Hyponatremia
HP:0001256Intellectual disability, mild
HP:0003690Limb muscle weakness
HP:0007178Motor polyneuropathy
HP:0005547Myeloproliferative disorder
HP:0002018Nausea
HP:0001271Polyneuropathy
HP:0002093Respiratory insufficiency
HP:0000711Restlessness
HP:0000763Sensory neuropathy
HP:0005946Ventilator dependence with inability to wean
Excluded (0%)
HP:0011121Abnormal skin morphology

Run the differential on the 1 obligate / very frequent terms

Annotation source: 32809671[PMID]_30766957[PMID]

7

Sources for this card