raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:55

Oculocutaneous albinism

Synonyms: OCA

Type
Clinical group
Group
Group of disorders
Inheritance
Autosomal recessive
Age of onset
Neonatal
Status
active

A group of rare genetic hypopigmentation disorders characterized by a generalized reduction in pigmentation of hair, skin and eyes and variable ocular findings including nystagmus, reduced visual acuity and photophobia. Variants include OCA1A (the most severe form), OCA1B, OCA1-minimal pigment (OCA1-MP), OCA1-temperature sensitive (OCA1-TS), OCA2, OCA3, OCA4, OCA5, OCA6, OCA7 and OCA8.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enOculocutaneous albinismOCA
frAlbinisme oculocutanéAOC
deAlbinismus, okulokutaner= en
esAlbinismo oculo-cutáneo
itAlbinismo oculocutaneo= en
nlOculocutaan albinisme= en
ptAlbinismo oculocutâneoAOC
plAlbinizm oczno-skórny= en
csOkulokutánní albinismus= en
ukОкулошкірний альбінізм= en
zh眼皮肤白化病= en
trOkülokutanöz albinizm= en

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
ICD-11EC23.20Especificvalidated
MONDO0018910Evalidated
MONDO18910Evalidated
MeSHD016115Evalidated
UMLSC0078918Evalidated
GARD10958Evalidated

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 (4):

Children (8):

4

Genes

0 direct

Orphanet records no gene directly on this code.

5

Prevalence and incidence

3 records
TypeClassValueAreaQualificationValidationSource
Point prevalence1-9 / 100 0005.9 / 100 000WorldwideValue and classValidated17980020[PMID]_[EXPERT]
Prevalence at birth1-9 / 100 0003.9 / 100 000DenmarkValue and classValidated19060277[PMID]
Point prevalence1-5 / 10 00045 / 100 000South AfricaValue and classValidated17620156[PMID]

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