raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:494526

Infantile-onset generalized dyskinesia with orofacial involvement

Synonyms: Infantile-onset orofacial-trunk-limbs dyskinesia

Type
Disease
Group
Disorder
Inheritance
Autosomal recessive
Age of onset
Infancy
Status
active

A rare hyperkinetic movement disorder characterized by delayed motor development and infantile onset of axial hypotonia and a generalized hyperkinetic movement disorder, principally with dyskinesia of the limbs and trunk, and facial involvement including orolingual dyskinesia, drooling, and dysarthria. Variable hyperkinetic movements may include a jerky quality, intermittent chorea and ballismus. Brain imaging is normal and cognitive performance is typically preserved.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enInfantile-onset generalized dyskinesia with orofacial involvementInfantile-onset orofacial-trunk-limbs dyskinesia
frDyskinésie généralisée à début infantile avec atteinte orofacialeDyskinésie des membres-tronc-orofacial à début infantile
deInfantile generalisierte Dyskinesie mit orofazialer BeteiligungOrofaziale-Rumpf-Glieder-Dyskinesie mit Beginn im Kindesalter
esDiscinesia generalizada con afectación orofacial de inicio en la lactanciaDiscinesia de estremidades-tronco-orofacial de inicio en la lactancia
itDiscinesia generalizzata ad esordio neonatale con interessamento orofacciale
nlGegeneraliseerde dyskinesie met orofaciale betrokkenheid met aanvang in de zuigelingentijdOrofaciale-romp-ledematen-dyskinesie met aanvang in de zuigelingentijd
ptDiscinesia generalizada de início na infância com envolvimento orofacial
plUogólniona dyskinezja o wczesnym początku w niemowlęctwie z zajęciem ust i twarzyDyskinezja niemowlęca ust i twarzy, tułowia i konczyn
csGeneralizovaná dyskinezie s orofaciálním postižením s nástupem v kojeneckém věkuDyskineze v orofaciální oblasti, oblasti trupu a koncetin s nástupem v detství · Dyskineze v orofaciální oblasti, oblasti trupu a končetin s nástupem v dětství
ukІнфантильна генералізована дискінезія з орофаціальним ураженнямДискінезія лицьового нерва, тулуба та кінцівок, що починається в дитячому віці
zh婴儿期发作的广泛性运动障碍伴口面部受累婴儿期发作的口面-躯干-肢体运动障碍
trOrofasiyal tutulumla seyreden infantil başlangıçlı jeneralize diskineziİnfantil başlangıçlı orofasiyal gövde ekstremite diskinezi

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM616921Evalidated
ICD-10G24.8NTBTattributednot yet validated
MONDO0044637Evalidated
UMLSC5567464Evalidated

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
PDE10ADisease-causing germline mutation(s) inAssessedHGNC:8772ENSG000001125416106526q27phosphodiesterase 10A27058446[PMID]
5

Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Cases/families8 casesWorldwideCase(s)Validated27058446[PMID]
Point prevalence<1 / 1 000 000—WorldwideClass onlyValidatedORPHANET_27058446[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

13 annotations · validated 2018-10-22
HPOTerm (as annotated by Orphanet)Diagnostic
Very frequent (99-80%)
HP:0002310Orofacial dyskinesiaDiagnostic criterion
Frequent (79-30%)
HP:0008936Axial hypotonia
HP:0002072Chorea
HP:0002307Drooling
HP:0001260Dysarthria
HP:0011968Feeding difficulties
HP:0002359Frequent falls
HP:0001270Motor delay
HP:0011470Nasogastric tube feeding in infancy
HP:0002317Unsteady gait
Occasional (29-5%)
HP:0100248Hemiballismus
HP:0001337Tremor
Excluded (0%)
HP:0012444Brain atrophy

Run the differential on the 1 obligate / very frequent terms

Annotation source: 27058446[PMID]

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Sources for this card