raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:658843

Developmental delay-ataxia-hypotonia-facial dysmorphism syndrome

Synonyms: HADDS · Hypotonia-ataxia-delayed developmental syndrome

Type
Malformation syndrome
Group
Disorder
Inheritance
Autosomal dominant
Age of onset
Antenatal, Infancy, Neonatal
Status
active

Orphadata ships no English definition for this code.

1

Names in Orphadata languages

10 of 12 languages
LangNameSynonyms
enDevelopmental delay-ataxia-hypotonia-facial dysmorphism syndromeHADDS · Hypotonia-ataxia-delayed developmental syndrome
frSyndrome de retard de développement-ataxie-hypotonie-dysmorphie facialeHADDS · Syndrome d'hypotonie-ataxie-retard de développement
deEntwicklungsverzögerung-Ataxie-Hypotonie-Gesichtsdysmorphie-SyndromHADDS · Hypotonie-Ataxie-Entwicklungsverzögerung-Syndrom
esSíndrome de retraso del desarrollo-ataxia-hipotonía-dismorfia facialHADDS · Síndrome de hipotonía-ataxia-retraso del desarrollo
itSindrome ritardo dello sviluppo-atassia-ipotonia-dismorfismi faccialiHADDS · Sindrome ipotonia-atassia-ritardo nello sviluppo
nlOntwikkelingsachterstand - ataxie - hypotonie - faciale dysmorfie-syndroomHADDS · Hypotonie - ataxie - ontwikkelingsachterstand-syndroom
ptSíndrome de perturbação do desenvolvimento intelectual-ataxia-hipotonia-dismorfia facial
plZespół opóźnienia rozwojowego, ataksji, hipotonii i dysmorfii twarzy= en
csSyndrom zahrnující vývojové opoždění, ataxii, hypotonii a faciální dysmorfii= en
ukСиндром затримки розвитку-атаксії-гіпотонії-дисморфізму обличчя
2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM617330Evalidated
ICD-10Q87.0NTBTattributedvalidated
MONDO15021Evalidated
UMLSC5925144Evalidated

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 (2):

No children.

4

Genes

1 direct
GeneAssociationStatusHGNCEnsemblOMIMLocusNameSource of validation
EBF3Disease-causing germline mutation(s) inAssessedHGNC:19087ENSG0000010800160740710q26.3EBF transcription factor 328017373[PMID]
5

Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Cases/families62 casesWorldwideCase(s)Validated28017373[PMID]_28017372[PMID]_28017370[PMID]_35340043[PMID]
Point prevalence<1 / 1 000 000—WorldwideClass onlyValidated28017373[PMID]_28017372[PMID]_28017370[PMID]_35340043[PMID]_ORPHANET

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

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

7

Sources for this card