raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:98768

Spinocerebellar ataxia type 13

Synonyms: SCA13

Type
Disease
Group
Disorder
Inheritance
Autosomal dominant
Age of onset
Adult
Status
active

Spinocerebellar ataxia type 13 (SCA13) is a very rare subtype of type I autosomal dominant cerebellar ataxia (ADCA type I). It is characterized by onset in childhood marked by delayed motor and cognitive development followed by mild progression of cerebellar ataxia.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enSpinocerebellar ataxia type 13SCA13
frAtaxie spinocérébelleuse type 13= en
deAtaxie, spinozerebelläre, Typ 13= en
esAtaxia espinocerebelosa tipo 13= en
itAtassia spinocerebellare, tipo 13= en
nlSpinocerebellaire ataxie type 13= en
ptAtaxia espinocerebelosa tipo 13= en
plAtaksja rdzeniowo-móżdżkowa typu 13= en
csSpinocerebelární ataxie, typ 13= en
ukСпіноцеребеллярна атаксія, тип 13= en
zh脊髓小脑共济失调13型= en
trSpinoserebellar ataksi tip 13= en

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM605259Evalidated
ICD-10G11.2NTBTattributedvalidated
ICD-118A03.16NTBTindexvalidated
MONDO0011529Evalidated
MeSHC537195Evalidated
UMLSC1854488Evalidated
GARD9611Evalidated

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
KCNC3Disease-causing germline mutation(s) inAssessedHGNC:6235ENSG0000013139817626419q13.33potassium voltage-gated channel subfamily C member 3
5

Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Cases/families20 casesWorldwideCase(s)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

32 annotations · validated 2018-04-17
HPOTerm (as annotated by Orphanet)Diagnostic
Frequent (79-30%)
HP:0001272Cerebellar atrophy
HP:0009046Difficulty running
HP:0001260Dysarthria
HP:0002066Gait ataxia
HP:0001288Gait disturbance
HP:0001290Generalized hypotonia
HP:0001263Global developmental delay
HP:0001347Hyperreflexia
HP:0006886Impaired distal vibration sensation
HP:0010794Impaired visuospatial constructive cognition
HP:0001256Intellectual disability, mild
HP:0002070Limb ataxia
HP:0001270Motor delay
HP:0000639Nystagmus
HP:0030187Titubation
Occasional (29-5%)
HP:0002312Clumsiness
HP:0002015Dysphagia
HP:0000365Hearing impairment
HP:0006801Hyperactive deep tendon reflexes
HP:0008003Jerky ocular pursuit movements
HP:0001336Myoclonus
HP:0000648Optic atrophy
HP:0000543Optic disc pallor
HP:0002172Postural instability
HP:0000473Torticollis
HP:0000020Urinary incontinence
HP:0000012Urinary urgency
Very rare (<4-1%)
HP:0001999Abnormal facial shape
HP:0002067Bradykinesia
HP:0001250Seizure
HP:0004322Short stature
HP:0025331Upgaze palsy

Annotation source: 10820125[PMID]_16135769[PMID]_23912307[PMID]_25981959[PMID]

7

Sources for this card