raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:98757

Spinocerebellar ataxia type 3

Synonyms: Azorean disease of the nervous system · MJD · Machado disease · Machado-Joseph disease · Nigro-spino-dentatal degeneration with nuclear ophthalmoplegia · SCA3

Type
Disease
Group
Disorder
Inheritance
Autosomal dominant
Age of onset
Adult, Childhood
Status
active

Spinocerebellar ataxia type 3 (SCA3), also known as Machado-Joseph disease, is the most common subtype of type 1 autosomal dominant cerebellar ataxia (ADCA type 1), a neurodegenerative disorder, and is characterized by ataxia, external progressive ophthalmoplegia, and other neurological manifestations.

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Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enSpinocerebellar ataxia type 3Azorean disease of the nervous system · MJD · Machado disease · Machado-Joseph disease · Nigro-spino-dentatal degeneration with nuclear ophthalmoplegia · SCA3
frAtaxie spinocérébelleuse type 3MJD · Maladie de Machado-Joseph · SCA3
deAtaxie, spinozerebelläre, Typ 3Azoren-Krankheit des Nervensystems · Degeneration, nigro-spino-dentale, mit nukleärer Ophthalmoplegie · MJD · Machado-Joseph-Krankheit · Machado-Krankheit · SCA3
esAtaxia espinocerebelosa tipo 3Degeneración nigroespinodental con oftalmoplejía nuclear · EMJ · Enfermedad de Machado · Enfermedad de Machado-Joseph · Enfermedad de las Azores del sistema nervioso · SCA3
itAtassia spinocerebellare, tipo 3Degenerazione nigro-spino-dentata con oftalmoplegia nucleare · Degenerazione nigrostriatale autosomica dominante · MJD · Malattia delle Azzorre con coinvolgimento del sistema nervoso · Malattia di Machado · Malattia di Machado-Joseph · SCA3
nlSpinocerebellaire ataxie type 3Azorenziekte van het zenuwstelsel · MJD · Nigro-spino-dentatale degeneratie met nucleaire oftalmoplegie · SCA3 · Ziekte van Machado · Ziekte van Machado-Joseph
ptAtaxia espinocerebelosa tipo 3Doença de Machado-Joseph · MJD · SCA3
plAtaksja rdzeniowo-móżdżkowa typu 3Autosomalnie dominujące zwyrodnienie nigrostriatalne · Azorańska choroba układu nerwowego · Choroba Machado · Choroba Machado i Josepha · MJD
csSpinocerebelární ataxie, typ 3MJD · Machadova choroba · Machadova-Josephova choroba · Nigro-spino-dentální degenerace s nukleární oftalmoplegií · SCA3 · Autozomálně dominantní striatonigrální degenerace · Azorské onemocnění nervového systému · Machado-Josephova choroba
ukСпіноцеребеллярна атаксія, тип 3Азорська хвороба нервової системи · Хвороба Мачадо · Хвороба Мачадо-Жозефа · MJD · Нігро-спіно-дентальна дегенерація з ядерною офтальмоплегією · SCA3
zh脊髓小脑共济失调3型黑质-脊髓-齿变性伴核性眼肌麻痹
trSpinoserebellar ataksi tip 3MJD · SCA3 · Machado hastalığı · Machado-Joseph hastalığı · Azor sinir sistemi hastalığı · Nükleer oftalmoplejili nigro-spino-dentatal dejenerasyon

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM109150Evalidated
ICD-10G11.8NTBTattributedvalidated
ICD-118A03.16NTBTindexvalidated
MONDO0007182Evalidated
MeSHD017827Evalidated
UMLSC0024408Evalidated
GARD6801Evalidated

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

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Classification

Preferential parent (Orphanet linearisation):

Parents in the classifications (2):

Children (3):

4

Genes

0 direct · 3 via subtypes

Orphanet records no gene directly on this code.

Recorded by Orphanet on subtypes of this disorder:

GeneSubtypeAssociationStatusHGNCEnsemblOMIMLocusNameSource of validation
ATXN3ORPHA:276238Machado-Joseph disease type 1Disease-causing germline mutation(s) inAssessedHGNC:7106ENSG0000006642760704714q32.12ataxin 3
ATXN3ORPHA:276241Machado-Joseph disease type 2Disease-causing germline mutation(s) inAssessedHGNC:7106ENSG0000006642760704714q32.12ataxin 3
ATXN3ORPHA:276244Machado-Joseph disease type 3Disease-causing germline mutation(s) inAssessedHGNC:7106ENSG0000006642760704714q32.12ataxin 3
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Prevalence and incidence

3 records
TypeClassValueAreaQualificationValidationSource
Point prevalence1-9 / 100 0001.5 / 100 000WorldwideValue and classValidated[EXPERT]
Point prevalence1-9 / 100 0001 / 100 000PortugalValue and classValidated21635785[PMID]
Point prevalence1-9 / 100 0005.5 / 100 000JapanValue and classValidated19169038[PMID]

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

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HPO phenotypes

16 annotations · validated 2017-04-26
HPOTerm (as annotated by Orphanet)Diagnostic
Very frequent (99-80%)
HP:0007256Abnormal pyramidal sign
HP:0002071Abnormality of extrapyramidal motor function
HP:0002312Clumsiness
HP:0000750Delayed speech and language development
HP:0000651Diplopia
HP:0001260Dysarthria
HP:0001332Dystonia
HP:0001347Hyperreflexia
HP:0000639Nystagmus
HP:0002073Progressive cerebellar ataxia
HP:0000590Progressive external ophthalmoplegia
HP:0000520Proptosis
HP:0003202Skeletal muscle atrophy
Occasional (29-5%)
HP:0001751Abnormal vestibular function
HP:0004370Abnormality of temperature regulation
HP:0001605Vocal cord paralysis

Run the differential on the 12 obligate / very frequent terms

Annotation source: 20301375[PMID]

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Sources for this card