raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:1168

Ataxia-oculomotor apraxia type 1

Synonyms: AOA1

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

A rare autosomal recessive cerebellar ataxia, characterized by progressive cerebellar ataxia associated with oculomotor apraxia, severe neuropathy, and hypoalbuminemia.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enAtaxia-oculomotor apraxia type 1AOA1
frSyndrome d'ataxie-apraxie oculo-motrice type 1= en
deAtaxie mit okulomotorischer Apraxie Typ 1= en
esAtaxia-apraxia oculomotora tipo 1= en
itAtassia-aprassia oculomotoria tipo 1AOA
nlAtaxie - oculomotorische apraxie type 1= en
ptAtaxia-apraxia oculo-motora tipo 1AOA
plAtaksja - apraksja gałkoruchowa typu 1= en
csAtaxie a okulomotorická apraxie, typ 1= en
ukАтаксія-окуломоторна апраксія, тип 1= en
zh共济失调动眼运用不能I型AOA1型
trAtaksi-okülomotor apraksi tip 1= en

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM208920Evalidated
ICD-10G11.3NTBTattributedvalidated
ICD-115C53.22NTBTindexvalidated
MONDO0008842Evalidated
MeSHC538013Evalidated
UMLSC1859598Evalidated
GARD9283Evalidated

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 (3):

No children.

4

Genes

1 direct
GeneAssociationStatusHGNCEnsemblOMIMLocusNameSource of validation
APTXDisease-causing germline mutation(s) inAssessedHGNC:15984ENSG000001370746063509p21.1aprataxin20301629[PMID]
5

Prevalence and incidence

1 record
TypeClassValueAreaQualificationValidationSource
Point prevalenceUnknown—WorldwideClass 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

5 annotations · validated 2016-06-01
HPOTerm (as annotated by Orphanet)Diagnostic
Very frequent (99-80%)
HP:0000707Abnormality of the nervous system
HP:0001251Ataxia
HP:0001288Gait disturbance
HP:0010747Medial flaring of the eyebrow
HP:0009830Peripheral neuropathy

Run the differential on the 5 obligate / very frequent terms

7

Sources for this card