raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:642675

CHD8 overgrowth syndrome

Synonyms: CHD8-related intellectual disability-autism-macrocephaly-tall stature syndrome · Chromodomain helicase DNA binding protein 8 overgrowth syndrome

Type
Disease
Group
Disorder
Inheritance
Autosomal dominant
Age of onset
No data available
Status
active

A rare multiple congenital anomalies/dysmorphic syndrome characterized by mild to moderate intellectual disability, autism spectrum phenotype, macrocephaly, tall stature, gastrointestinal problems (including recurrent constipation), distinctive facial features (including wide-set eyes with down-slanted palpebral fissure, broad nose with full nasal tip, pointed chin and broad forehead with prominent supraorbital ridge) and sleep problems. Other clinical manifestations include anxiety problems, attention problems, impaired social interactions and seizures.

1

Names in Orphadata languages

10 of 12 languages
LangNameSynonyms
enCHD8 overgrowth syndromeCHD8-related intellectual disability-autism-macrocephaly-tall stature syndrome · Chromodomain helicase DNA binding protein 8 overgrowth syndrome
frSyndrome de croissance excessive associé à CHD8Syndrome de croissance excessive associé à chromodomain helicase DNA binding protein 8 · Syndrome de déficience intellectuelle-autisme-macrocéphalie-grande taille associé à CHD8
deCHD8-assoziiertes Großwuchs-SyndromIntelligenzminderung-Autismus-Makrozephalie-Hochwuchs-Syndrom, CHD8-Gen-assoziiertes
esSíndrome de sobrecrecimiento CHD8Síndrome de discapacidad intelectual-autismo-macrocefalia-talla alta asociado a CHD8 · Síndrome de sobrecrecimiento por la proteína 8 de unión al ADN con cromodominio helicasa
itSindrome da iperaccrescimento correlata a CHD8Sindrome da iperaccrescimento correlata alla proteina 8 legante il cromodominio elicasi DNA · Sindrome disabilità intellettiva-autismo-macrocefalia-alta statura correlata a CHD8
nlCHD8-overgroeisyndroomCHD8-gerelateerd intellectuele achterstand - autisme - macrocefalie - grote gestalte-syndroom · Chromodomein helicase DNA-bindingsproteïne 8-overgroeisyndroom
ptSíndrome de sobrecrescimento CHD8Síndrome de perturbação do desenvolvimento intelectual-autismo-macrocefalia-estatura elevada CHD8-relacionada · Síndrome de sobrecrescimento relacionado com o cromodomínio helicase da proteína 8 de ligação ao ADN
plPrzerost CDH8Zespół przerostu CHD8
csSyndrom nadměrného vzrůstu CHD8= en
ukСиндром надмірного росту CHD8CHD8-повязаний синдром інтелектуальної недостатності-аутизму-макроцефалії-макроцефалії- високого зросту · Синдром надмірного росту хромодоменного геліказа ДНК-звязуючого білка 8

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM615032Evalidated
ICD-10Q87.3NTBTattributedvalidated
MONDO0014017Evalidated
UMLSC5816801Evalidated

E exact · NTBT this ORPHAcode is narrower than the target · BTNT broader than the target · ND not decided.

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Classification

Preferential parent (Orphanet linearisation):

Parents in the classifications (3):

No children.

4

Genes

1 direct
GeneAssociationStatusHGNCEnsemblOMIMLocusNameSource of validation
CHD8Disease-causing germline mutation(s) (loss of function) inAssessedHGNC:20153ENSG0000010088861052814q11.2chromodomain helicase DNA binding protein 824998929[PMID]_26789910[PMID]
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Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Cases/families73 casesWorldwideCase(s)Validated24998929[PMID]_26789910[PMID]_31721432[PMID]_31001818[PMID]_38441608[PMID]
Point prevalence<1 / 1 000 000—WorldwideClass onlyValidated24998929[PMID]_26789910[PMID]_31721432[PMID]_31001818[PMID]_38441608[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.

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Sources for this card