raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:98769

Spinocerebellar ataxia type 15/16

Synonyms: SCA15/16

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

Spinocerebellar ataxia type 15/16 (SCA15/16) is a rare subtype of type I autosomal dominant cerebellar ataxia (ADCA type I). It is characterized by cerebellar ataxia, tremor and cognitive impairment.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enSpinocerebellar ataxia type 15/16SCA15/16
frAtaxie spinocérébelleuse type 15/16= en
deAtaxie, spinozerebelläre, Typ 15/16= en
esAtaxia espinocerebelosa tipo 15/16= en
itAtassia spinocerebellare, tipo 15/16= en
nlSpinocerebellaire ataxie type 15/16= en
ptAtaxia espinocerebelosa tipo 15/16= en
plAtaksja rdzeniowo-móżdżkowa typu 15/16= en
csSpinocerebelární ataxie, typ 15/16= en
ukСпіноцеребеллярна атаксія, тип 15/16= en
zh脊髓小脑共济失调15/16型= en
trSpinoserebellar ataksi tipi 15/16SCA15 / 16

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM606658Evalidated
ICD-10G11.2NTBTattributedvalidated
ICD-118A03.16NTBTindexvalidated
MONDO0011694Evalidated
UMLSC1847725Evalidated
GARD10477Evalidated

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 (1):

No children.

Codes that Orphanet moved or referred to this one:

4

Genes

1 direct
GeneAssociationStatusHGNCEnsemblOMIMLocusNameSource of validation
ITPR1Disease-causing germline mutation(s) inAssessedHGNC:6180ENSG000001509951472653p26.1inositol 1,4,5-trisphosphate receptor type 1
5

Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Cases/families80 casesWorldwideCase(s)ValidatedDr Shinsuke FUJIOKA[EXPERT]_Dr Nathaniel WHALEY[EXPERT]_Dr Zbigniew WSZOLEK[EXPERT]
Point prevalence<1 / 1 000 000—WorldwideClass onlyValidatedORPHANET_[EXPERT]

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

8 annotations · validated 2018-04-17
HPOTerm (as annotated by Orphanet)Diagnostic
Very frequent (99-80%)
HP:0001251Ataxia
Frequent (79-30%)
HP:0002345Action tremor
HP:0001272Cerebellar atrophy
HP:0002066Gait ataxia
HP:0002346Head tremor
HP:0001347Hyperreflexia
HP:0030188Tremor by anatomical site
HP:0007351Upper limb postural tremor

Run the differential on the 1 obligate / very frequent terms

Annotation source: 11723290[PMID]_14981189[PMID]

7

Sources for this card