raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:882

Tyrosinemia type 1

Synonyms: FAH deficiency · Fumarylacetoacetase deficiency · Fumarylacetoacetate hydrolase deficiency · Hepatorenal tyrosinemia · Tyrosinemia type I

Type
Disease
Group
Disorder
Inheritance
Autosomal recessive
Age of onset
All ages
Status
active

A rare inborn error of tyrosine catabolism characterized by progressive liver disease, renal tubular dysfunction, porphyria-like crises and a dramatic improvement in prognosis following treatment with nitisinone.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enTyrosinemia type 1FAH deficiency · Fumarylacetoacetase deficiency · Fumarylacetoacetate hydrolase deficiency · Hepatorenal tyrosinemia · Tyrosinemia type I
frTyrosinémie type 1Déficit en FAH · Déficit en fumarylacétoacétase · Déficit en fumarylacétoacétate hydrolase · Tyrosinose hépato-rénale · Tyrosinémie hépato-rénale · Tyrosinémie type I
deTyrosinämie Typ 1FAH-Mangel · Fumarylacetoacetase-Hydrolase-Mangel · Fumarylacetoacetase-Mangel · Tyrosinämie Typ I · Tyrosinämie, hepatorenale
esTirosinemia tipo 1Deficiencia de FAH · Deficiencia de fumarilacetoacetasa · Deficiencia de fumarilacetoacetasa hidrolasa · Tirosinemia hepatorrenal · Tirosinemia tipo I
itTirosinemia, tipo 1Deficit di FAH · Deficit di fumaril acetoacetasi · Deficit di fumaril acetoacetato idrolasi · Tirosinemia epatorenale · Tirosinemia, tipo I
nlTyrosinemie type 1Deficiëntie van fumarylacetoacetaat-hydrolase · Deficiëntie van fumarylacetoacetase · FAH-deficiëntie · Hepatorenale tyrosinemie · Tyrosinemie type I
ptTirosinemia tipo 1Deficiência de fumarilacetoacetase · Tirosinemia hepato-renal
plTyrozynemia typu 1Niedobór FAH · Niedobór fumaryloacetoacetazy · Niedobór hydrolazy fumaryloacetooctanu · Tyrozynemia typu I · Tyrozynemia wątrobowo-nerkowa
csTyrozinemie, typ 1FAH deficit · Deficit fumarylacetoacetázy · Deficit fumarylacetoacetát hydrolázy · Hepatorenální tyrosinémie · Tyrosinémie, typ I
ukТирозинемія, тип 1Дефіцит FAH · Дефіцит фумарилацетоацетази · Дефіцит фумарилацетоацетатної гідролази · Гепаторенальна тирозинемія · Тирозинемія I типу
zh酪氨酸血症1型延胡索酰乙酰乙酸水解酶缺乏症
trTirozinemi tip 1FAH eksikliği · Tirozinemi tip I · Hepatorenal tirozinemi · Fumarilasetoasetaz eksikliği · fumarilasetoasetat hidrolaz eksikliği

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM276700Evalidated
ICD-10E70.2NTBTinclusionvalidated
ICD-115C50.11Especificvalidated
MONDO0010161Evalidated
UMLSC0268490Evalidated
GARD2658Evalidated
MedDRA10069462Evalidated

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 (7):

No children.

4

Genes

1 direct
GeneAssociationStatusHGNCEnsemblOMIMLocusNameSource of validation
FAHDisease-causing germline mutation(s) inAssessedHGNC:3579ENSG0000010387661387115q25.1fumarylacetoacetate hydrolase20301688[PMID]
5

Prevalence and incidence

7 records
TypeClassValueAreaQualificationValidationSource
Prevalence at birth1-9 / 1 000 0000.9 / 100 000WorldwideValue and classValidated20301688[PMID]
Prevalence at birth1-9 / 100 0001.5 / 100 000NorwayValue and classNot yet validated20301688[PMID]_22554029[PMID]
Prevalence at birth1-9 / 100 0001.1 / 100 000FinlandValue and classValidated33046095[PMID]
Prevalence at birth1-9 / 100 0006.7 / 100 000TunisiaValue and classValidated22481200[PMID]
Prevalence at birth1-9 / 100 0006.25 / 100 000Specific populationValue and classValidated20301688[PMID]
Prevalence at birth1-5 / 10 00054 / 100 000Specific populationValue and classValidated2378355[PMID]
Point prevalenceUnknown—EuropeClass onlyValidatedORPHANET

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

6 annotations · validated 2016-06-01
HPOTerm (as annotated by Orphanet)Diagnostic
Very frequent (99-80%)
HP:0002909Generalized aminoaciduria
Occasional (29-5%)
HP:0006554Acute hepatic failure
HP:0001402Hepatocellular carcinoma
HP:0002240Hepatomegaly
HP:0006463Rickets of the lower limbs
HP:0001744Splenomegaly

Run the differential on the 1 obligate / very frequent terms

7

Sources for this card