raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:97249

Pontocerebellar hypoplasia type 3

Synonyms: Cerebellar atrophy with progressive microcephaly · PCH3

Type
Clinical subtype
Group
Subtype of disorder
Inheritance
Autosomal recessive
Age of onset
Neonatal
Status
active

A rare, genetic form of pontocerebellar hypoplasia (PCH) characterized by neocortical and pontocerebellar hypoplasia with pons and cerebellum equally affected and that clinically manifests with neonatal hypotonia and impaired swallowing followed by seizures, optic atrophy and short stature from infancy onward. Movement disorders, as seen in other forms of PCH, are absent.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enPontocerebellar hypoplasia type 3Cerebellar atrophy with progressive microcephaly · PCH3
frHypoplasie pontocérébelleuse type 3Atrophie du cervelet avec microcéphalie progressive · HPC3 · PCH3
dePontozerebelläre Hypoplasie Typ 3Kleinhirnatrophie mit progressiver Mikrozephalie · PCH3
esHipoplasia pontocerebelosa tipo 3Atrofia cerebelosa con microcefalia progresiva · HPC3
itIpoplasia pontocerebellare, tipo 3Atrofia cerebellare con microcefalia progressiva · PCH3
nlPontocerebellaire hypoplasie type 3Cerebellaire atrofie met progressieve microcefalie · PCH3
ptHipoplasia pontocerebelosa tipo 3Microcefalia progressiva com atrofia cerebelosa
plHipoplazja mostowo-móżdżkowa typu 3Hipoplazja mostowo-móżdżkowa bez dyskinezji · Zanik móżdżku z postępującym małogłowiem · Hipoplazja mostowo-móżdżkowa z zanikiem nerwu wzrokowego
csPontocerebelární hypoplázie, typ 3CLAM · PCH s atrofií optiku · PCH bez dyskineze · PCH3 · Mozečková atrofie s progresivní mikrocefalií
ukГіпоплазія мозочка, тип 3Атрофія мозочка з прогресуючою мікроцефалією · PCH3
zh脑桥小脑发育不全症3型小脑萎缩伴进行性小头畸形
trPontoserebellar hipoplazi tip 3CLAM · PCH3 · Optik atrofi ile seyreden PCH · Diskinezi ile seyretmeyen PCH · İlerleyici mikrosefali ile seyreden serebellar atrofi

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM608027Evalidated
ICD-10Q04.3NTBTattributedvalidated
ICD-11LD20.01NTBTindexvalidated
MONDO0011948Evalidated
MeSHC548072Evalidated
UMLSC1842687Evalidated
GARD10708Evalidated

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
PCLODisease-causing germline mutation(s) inAssessedHGNC:13406ENSG000001864726049187q21.11piccolo presynaptic cytomatrix protein25832664[PMID]
5

Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Cases/families3 familiesWorldwideFamily(ies)Validated[EXPERT]
Point prevalence<1 / 1 000 000—WorldwideClass onlyValidatedORPHANET

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