raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:1188

Ataxia-deafness-intellectual disability syndrome

historical

Synonyms: Ataxia-hearing loss-intellectual disability syndrome · Reardon-Baraitser syndrome

Type
Malformation syndrome
Group
Disorder
Inheritance
Unknown
Age of onset
Childhood, Infancy
Status
historical

A rare genetic syndromic intellectual disability characterized by global developmental delay, intellectual disability, infantile or childhood onset of progressive ataxia, and bilateral sensorineural hearing impairment. Variable features include signs of upper and lower motor neuron disease, peripheral neuropathy, myopathic facies, lower limb muscle wasting, and heel contractures. There have been no further descriptions in the literature since 1993.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enAtaxia-deafness-intellectual disability syndromeAtaxia-hearing loss-intellectual disability syndrome · Reardon-Baraitser syndrome
frSyndrome d'ataxie-surdité-déficience intellectuelleSyndrome de Reardon-Baraitser
deAtaxie-Schwerhörigkeit-Intelligenzminderung-SyndromAtaxie-Hörverlust-Intelligenzminderung-Syndrom · Reardon-Baraitser-Syndrom
esSíndrome de ataxia-sordera-discapacidad intelectualSíndrome de Reardon-Baraitser · Síndrome de ataxia-hipoacusia-discapacidad intelectual
itSindrome atassia-sordità-disabilità cognitivaSindrome di Reardon-Baraitser
nlAtaxie - doofheid - intellectuele achterstand-syndroomAtaxie - gehoorverlies - intellectuele achterstand-syndroom · Syndroom van Reardon-Baraitser
ptSíndrome de ataxia-surdez-perturbação do desenvolvimento intelectualSíndrome Reardon-Baraitser · Síndrome de ataxia-perda auditiva-perturbação do desenvolvimento
plZespół ataksji, głuchoty i niepełnosprawności intelektualnejZespół Reardona i Baraitsera
csSyndrom zahrnující ataxii, hluchotu a mentální retardaciReardonův-Baraitserův syndrom · Reardon-Baraitserův syndrom
ukСиндром атаксії-глухоти-інтелектуальної недостатностіСиндром атаксії-втрати слуху-інтелектуальної недостатності · Синдром Ріардона-Барайзера
zh共济失调-耳聋-智力障碍综合征Reardon-Baraitser综合征
trAtaksi-sağırlık-zihinsel yetersizlik sendromuAtaksi-işitme kaybı-zihinsel yetersizlik sendromu · Reardon-Baraitser sendromu

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM208850Evalidated
ICD-10G11.1NTBTattributedvalidated
ICD-11LD2H.YNTBTindexvalidated
MONDO0008838Evalidated
UMLSC4304023Evalidated
GARD4644Evalidated

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 (5):

No children.

4

Genes

0 direct

Orphanet records no gene directly on this code.

5

Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Cases/families8 casesWorldwideCase(s)Validated4728186[PMID]_3470627[PMID]_8411058[PMID]
Point prevalence<1 / 1 000 000—WorldwideClass onlyValidatedORPHANET_4728186[PMID]_3470627[PMID]_8411058[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

17 annotations · validated 2016-06-01
HPOTerm (as annotated by Orphanet)Diagnostic
Very frequent (99-80%)
HP:0001251Ataxia
HP:0001249Intellectual disability
HP:0000639Nystagmus
HP:0000407Sensorineural hearing impairment
HP:0000486Strabismus
Frequent (79-30%)
HP:0000174Abnormal palate morphology
HP:0002167Abnormality of speech or vocalization
HP:0007360Aplasia/Hypoplasia of the cerebellum
HP:0002120Cerebral cortical atrophy
HP:0000762Decreased nerve conduction velocity
HP:0003457EMG abnormality
HP:0001252Hypotonia
HP:0001315Reduced tendon reflexes
HP:0002650Scoliosis
HP:0003202Skeletal muscle atrophy
HP:0002119Ventriculomegaly
Occasional (29-5%)
HP:0001382Joint hypermobility
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Sources for this card