raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:2116

Hartnup disease

Synonyms: Aminoaciduria, Hartnup type · Hartnup disorder

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

A rare metabolic disorder belonging to the neutral aminoacidurias, mainly characterized by skin photosensitivity, ocular and neuropsychiatric features, due to abnormal renal and gastrointestinal transport of neutral amino acids (tryptophan, alanine, asparagine, glutamine, histidine, isoleucine, leucine, phenylalanine, serine, threonine, tyrosine and valine).

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enHartnup diseaseAminoaciduria, Hartnup type · Hartnup disorder
frMaladie de HartnupAminoacidurie type Hartnup
deHartnup-SyndromHartnup-Krankheit
esSíndrome de HartnupAminoaciduria tipo Hartnup · Trastorno de Hartnup
itSindrome di HartnupAminoaciduria, tipo Hartnup · Malattia di Hartnup
nlZiekte van HartnupAminoacidurie, Hartnup-type · Hartnupstoornis
ptSíndrome Hartnup
plZespół HartnupówAminoaciduria typu Hartnupów · Choroba Hartnupów
csHartnupova nemocHartnupova choroba · Aminoacidurie, Hartnupův typ
ukХвороба ХартнупаАміноацидурія, тип Хартнупа · Хвороба Хартнупа
zhHartnup病氨基酸尿症,Hartnup型
trHartnup hastalığıHartnup bozukluğu · Aminoasidüri, Hartnup tipi

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM234500Evalidated
ICD-10E72.0NTBTinclusionvalidated
ICD-115C60.YNTBTindexvalidated
MONDO0009324Evalidated
MeSHD006250Evalidated
UMLSC0018609Evalidated
GARD6569Evalidated
MedDRA10019165Evalidated

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 (6):

No children.

4

Genes

2 direct
GeneAssociationStatusHGNCEnsemblOMIMLocusNameSource of validation
CLTRNDisease-causing germline mutation(s) inAssessedHGNC:29437ENSG00000147003300631Xp22.2collectrin, amino acid transport regulator31520464[PMID]
SLC6A19Disease-causing germline mutation(s) inAssessedHGNC:27960ENSG000001743586088935p15.33solute carrier family 6 member 1915286787[PMID]_15286788[PMID]
5

Prevalence and incidence

5 records
TypeClassValueAreaQualificationValidationSource
Prevalence at birth1-9 / 100 0003.85 / 100 000United StatesValue and classValidatedISBN:79130356[OTHER]_17555458[PMID]
Prevalence at birth1-9 / 100 0001.9 / 100 000Specific populationValue and classValidatedISBN:79130356[OTHER]
Point prevalence1-9 / 100 0004 / 100 000United KingdomValue and classValidated909480[PMID]
Point prevalence1-9 / 100 0004.2 / 100 000WorldwideValue and classValidatedISBN:79130356[OTHER]_[EXPERT]
Prevalence at birth1-9 / 100 0003.3 / 100 000AustraliaValue and classValidatedISBN:79130356[OTHER]

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

30 annotations · validated 2024-05-28
HPOTerm (as annotated by Orphanet)Diagnostic
Very frequent (99-80%)
HP:0012086Abnormal urinary color
HP:0000739Anxiety
HP:0001251Ataxia
HP:0000992Cutaneous photosensitivity
HP:0002353EEG abnormality
HP:0000712Emotional lability
HP:0000738Hallucinations
HP:0001347Hyperreflexia
HP:0001252Hypotonia
HP:0002076Migraine
HP:0008353Neutral hyperaminoaciduria
Frequent (79-30%)
HP:0000504Abnormality of vision
HP:6000130Elevated urinary indican level
HP:0002024Malabsorption
HP:0000639Nystagmus
HP:0000613Photophobia
HP:0000988Skin rash
HP:0000486Strabismus
HP:0001337Tremor
Occasional (29-5%)
HP:0008066Abnormal blistering of the skin
HP:0000230Gingivitis
HP:0001263Global developmental delay
HP:0000206Glossitis
HP:0001053Hypopigmented skin patches
HP:0002383Infectious encephalitis
HP:0001249Intellectual disability
HP:0007400Irregular hyperpigmentation
HP:0000709Psychosis
HP:0001250Seizure
HP:0004322Short stature

Run the differential on the 11 obligate / very frequent terms

Annotation source: 32644502[PMID]

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Sources for this card