raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:269203

Isolated cerebellar vermis agenesis

Type
Morphological anomaly
Group
Disorder
Age of onset
Infancy, Neonatal
Status
active

A rare, congenital, cerebellar malformation disorder characterized by complete or partial cerebellar vermis agenesis, with no other associated malformations or anomalies. Patients may be asymptomatic, although psychomotor delay, hypotonia and incoordination are usually associated. Additional variable manifestations include intellectual disability, oculomotor abnormalities (such as nystagmus, impaired smooth pursuit, impaired saccades, strabismus, ptosis, and oculomotor apraxia), retinopathy, abnormal visual evoked potentials, ataxia, episodic hyperpnea, and delayed gait acquisition, as well as delayed speech and language development.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enIsolated cerebellar vermis agenesis
frAgénésie isolée du vermis cérébelleux
deIsolierte Agenesie des Kleinhirnwurmes
esAgenesia aislada del vermis cerebeloso
itAgenesia isolata del verme cerebellare
nlGeïsoleerde cerebellaire vermis-agenesie
ptAgenesia do vermis cerebeloso isolada
plIzolowana agnezja robaka móżdżku
csIzolovaná ageneze mozečkové vermisIzolovaná ageneze vermis cerebela · Izolovaná ageneze vermis mozečku
ukІзольована агенезія червяка мозочка
zh孤立性小脑蚓部发育不全
trİzole serebellar vermis agenezisi

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
ICD-10Q04.3NTBTattributedvalidated
MONDO0017107Evalidated
UMLSC5680776Evalidated

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 (1):

Children (2):

4

Genes

0 direct

Orphanet records no gene directly on this code.

5

Prevalence and incidence

1 record
TypeClassValueAreaQualificationValidationSource
Point prevalenceUnknown—WorldwideClass onlyValidatedORPHANET_10488899[PMID]_7724272[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.

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HPO phenotypes

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

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Sources for this card