raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:370109

Ataxia-telangiectasia variant

Synonyms: v-AT

Type
Disease
Group
Disorder
Inheritance
Autosomal recessive
Status
active

A rare, genetic, persistent combined dystonia characterized by clinical signs similar to ataxia-telangiectasia but with a later (usually adulthood) onset and slower progression. Patients typically present extrapyramidal signs, such as resting tremor, choreathetosis, and dystonia, as the initial symptoms and later often develop mild cerebellar ataxia (with gait usually preserved). Telangiectasia and immunodeficiency may be absent but secondary features of ataxia-telangiectasia, such as risk of malignancy, dysarthria and peripheral neuropathy, are frequently present.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enAtaxia-telangiectasia variantv-AT
frVariant de l'ataxie-télangiectasie= en
deAtaxia-Teleangiectasia Variante= en
esVariante de ataxia-telangiectasia= en
itVariante dell'atassia-telangectasia= en
nlVariant van ataxie-teleangiëctasie= en
ptAtaxia - telangiectasia, variante de
plWariant ataksja-telangiektazja= en
csVariantní ataxia-telangiectasiav-AT · Ataxia teleangiectasia - varianta
ukВаріант атаксії-телеангіектазії= en
zh共济失调-毛细血管扩张变异= en
trAtaksi-telenjiektazi varyantı= en

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM208900NTBTvalidated
ICD-10G11.3NTBTattributedvalidated
MONDO0018266Evalidated
MeSHC566865Evalidated
UMLSC1876175Evalidated

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):

No children.

Codes that Orphanet moved or referred to this one:

4

Genes

1 direct
GeneAssociationStatusHGNCEnsemblOMIMLocusNameSource of validation
ATMDisease-causing germline mutation(s) (loss of function) inAssessedHGNC:795ENSG0000014931160758511q22.3ATM serine/threonine kinase23946315[PMID]
5

Prevalence and incidence

0 records

No prevalence record in this release.

6

HPO phenotypes

Orphanet has no HPO annotation for this code in this release.

7

Sources for this card