raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:91496

Snowflake vitreoretinal degeneration

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

Snowflake vitreoretinal degeneration (SVD) is characterised by the presence of small granular-like deposits resembling snowflakes in the retina, fibrillary vitreous degeneration and cataract. The prevalence is unknown but the disorder has been described in several families. Transmission is autosomal dominant and the causative gene has been localised to a small region on chromosome 2q36.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enSnowflake vitreoretinal degeneration
frDégénérescence vitréo-rétinienne en flocons de neige
deVitreoretinale Schneeflocken-DegenerationSchneeflocken-Vitreoretinopathie
esDegeneración vitreorretiniana tipo copo de nieve
itDegenerazione vitreoretinica a fiocchi di neve
nlVitreoretinale degeneratie, sneeuwvlokken-type
ptDegeneração vitreo-retiniana em floco de neve
plZwyrodnienie ciała szklistego i siatkówki typu "płatki śniegu
csVločkovitá vitreoretinální degenerace
ukВітреоретинальна дегенерація за типом сніжинки
zh雪花状玻璃体视网膜变性
trKar tanesi vitreoretinal dejenerasyon

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM193230Evalidated
ICD-10H35.5NTBTattributedvalidated
ICD-119B70NTBTindexvalidated
MONDO0008663Evalidated
MeSHC536677Evalidated
UMLSC1860405Evalidated
GARD9706Evalidated

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.

4

Genes

1 direct
GeneAssociationStatusHGNCEnsemblOMIMLocusNameSource of validation
KCNJ13Disease-causing germline mutation(s) inAssessedHGNC:6259ENSG000001154746032082q37.1potassium inwardly rectifying channel subfamily J member 1318179896[PMID]
5

Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Cases/families50 casesWorldwideCase(s)ValidatedORPHANET
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