raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:504476

Cerebellar ataxia with neuropathy and bilateral vestibular areflexia syndrome

Synonyms: CABV syndrome · CANVAS · Cerebellar ataxia with bilateral vestibulopathy syndrome

Type
Disease
Group
Disorder
Inheritance
Autosomal recessive
Age of onset
Adult, Elderly
Status
active

A rare slowly progressive autosomal recessive syndromic cerebellar ataxia characterized by late-onset cerebellar dysfunction (including gait and limb ataxia, nystagmus, and dysarthria), bilateral vestibulopathy (abnormal vestibulo-ocular reflex), and axonal sensory neuropathy. Variable features may include chronic cough and autonomic dysfunction. Brain imaging usually shows cerebellar atrophy.

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Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enCerebellar ataxia with neuropathy and bilateral vestibular areflexia syndromeCABV syndrome · CANVAS · Cerebellar ataxia with bilateral vestibulopathy syndrome
frSyndrome d'ataxie cérébelleuse avec neuropathie et aréflexie vestibulaire bilatéraleCANVAS · Syndrome d'ataxie cérébelleuse avec vestibulopathie bilatérale
deZerebelläre Ataxie-Neuropathie-bilaterale vestibuläre Areflexie-SyndromCABV-Syndrom · CANVAS · Zerebelläre Ataxie und bilaterale Vestibulopathie-Syndrom
esSíndrome de ataxia cerebelosa con neuropatía y arreflexia vestibular bilateralCANVAS · Síndrome CABV · Síndrome de ataxia cerebelosa con vestibulopatía bilateral
itSindrome atassia cerebellare con neuropatia e areflessia vestibolare bilaterale
nlCerebellaire ataxie - neuropathie - bilaterale vestibulaire areflexie-syndroomCABV-syndroom · CANVAS · Cerebellaire ataxie met bilaterale vestibulopathie-syndroom
ptSíndrome de ataxia cerebelosa com neuropatia e arreflexia vestibular bilateral
plZespół obustronnej arefleksji narządu przedsionkowego i ataksji móżdżkowej z neuropatią= en
csSyndrom zahrnující mozečkovou ataxii s neuropatií a bilaterální vestibulární areflexiíCANVAS · Syndrom CABV · Syndrom mozečkové ataxie s bilaterální vestibulopatií
ukМозочкова атаксія з нейропатією та синдромом двосторонньої вестибулярної арефлексіїCABV-синдром · CANVAS · Мозочкова атаксія з синдромом двосторонньої вестибулопатії
zh小脑共济失调伴神经病变和双侧前庭反射综合征小脑共济失调和双侧前庭病综合征
trNöropati ve bilateral vestibüler arefleksi sendromu ile seyreden serebellar ataksiCANVAS · CABV sendromu · Bilateral vestibülopati sendromu ile seyreden serebellar ataksi

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM614575Evalidated
ICD-10G11.2NTBTattributedvalidated
MONDO0044720Evalidated
MeSHC000726747Evalidated
UMLSC3281223Evalidated
MedDRA10078216Evalidated

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
RFC1Disease-causing germline mutation(s) inAssessedHGNC:9969ENSG000000359281025794p14replication factor C subunit 130926972[PMID]
5

Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Point prevalence<1 / 1 000 000—WorldwideClass onlyValidatedORPHANET_25564090[PMID]_30926972[PMID]
Cases/families100 casesWorldwideCase(s)Validated25564090[PMID]_30926972[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.

6

HPO phenotypes

16 annotations · validated 2018-11-26
HPOTerm (as annotated by Orphanet)Diagnostic
Frequent (79-30%)
HP:0001284Areflexia
HP:0003487Babinski sign
HP:0000750Delayed speech and language development
HP:0007108Demyelinating peripheral neuropathy
HP:0002460Distal muscle weakness
HP:0001260Dysarthria
HP:0002075Dysdiadochokinesis
HP:0001310Dysmetria
HP:0002066Gait ataxia
HP:0002080Intention tremor
HP:0002828Multiple joint contractures
HP:0000648Optic atrophy
HP:0002073Progressive cerebellar ataxiaDiagnostic criterion
HP:0007141Sensorimotor neuropathy
HP:0000407Sensorineural hearing impairment
HP:0008568Vestibular areflexiaDiagnostic criterion

Annotation source: 26669662[PMID]

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Sources for this card