raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:98763

Spinocerebellar ataxia type 14

Synonyms: SCA14

Type
Disease
Group
Disorder
Inheritance
Autosomal dominant
Age of onset
Adolescent, Adult, Childhood, Elderly
Status
active

Spinocerebellar ataxia type 14 (SCA14) is a rare mild subtype of type I autosomal dominant cerebellar ataxia (ADCA type I). It is characterized by slowly progressive ataxia, dysarthria and nystagmus.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enSpinocerebellar ataxia type 14SCA14
frAtaxie spinocérébelleuse type 14= en
deAtaxie, spinozerebelläre, Typ 14= en
esAtaxia espinocerebelosa tipo 14= en
itAtassia spinocerebellare, tipo 14= en
nlSpinocerebellaire ataxie type 14= en
ptAtaxia espinocerebelosa tipo 14= en
plAtaksja rdzeniowo-móżdżkowa typu 14= en
csSpinocerebelární ataxie, typ 14= en
ukСпіноцеребеллярна атаксія, тип 14= en
zh脊髓小脑共济失调14型= en
trSpinoserebellar ataksi tip 14= en

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM605361Evalidated
ICD-10G11.2NTBTattributedvalidated
ICD-118A03.16NTBTindexvalidated
MONDO0011540Evalidated
MeSHC537196Evalidated
UMLSC1854369Evalidated
GARD9867Evalidated

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
PRKCGDisease-causing germline mutation(s) inAssessedHGNC:9402ENSG0000012658317698019q13.42protein kinase C gamma
5

Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Cases/families20 familiesWorldwideFamily(ies)Validated20301573[PMID]_[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

15 annotations · validated 2018-04-13
HPOTerm (as annotated by Orphanet)Diagnostic
Very frequent (99-80%)
HP:0002066Gait ataxia
Frequent (79-30%)
HP:0005109Abnormality of the Achilles tendon
HP:0006855Cerebellar vermis atrophy
HP:0001290Generalized hypotonia
HP:0002070Limb ataxia
HP:0002073Progressive cerebellar ataxia
Occasional (29-5%)
HP:0100543Cognitive impairment
HP:0001260Dysarthria
HP:0000640Gaze-evoked nystagmus
HP:0002600Hyporeflexia of lower limbs
HP:0001336Myoclonus
HP:0002063Rigidity
HP:0001152Saccadic smooth pursuit
HP:0003474Somatic sensory dysfunction
HP:0001337Tremor

Run the differential on the 1 obligate / very frequent terms

Annotation source: 10939565[PMID]_20301573[PMID]

7

Sources for this card