raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:98944

Coloboma of iris

Type
Morphological anomaly
Group
Disorder
Age of onset
Antenatal
Status
active

A rare, genetic, developmental defect of the eye characterized by a uni- or bilateral notch, gap, hole or fissure, typically located in the inferonasal quadrant of the eye, involving only the pigment epithelium or the iris stroma (incomplete) or involving both (complete), manifesting with iris shape anomalies (e.g. 'keyhole' or oval pupil) and/or photophobia. Association with colobomata in other parts of the eye (incl. ciliary body, zonule, choroid, retina, optic nerve) and complex malformation syndromes (such as CHARGE syndrome) may be observed.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enColoboma of iris
frColobome de l'irisColobome irien
deIriskolobom
esColoboma de iris
itColoboma dell'iride
nlColoboom van irisIriscoloboom
ptColoboma da íris
plSzczelina tęczówki
csKolobom duhovky
ukКолобома райдужки
zh虹膜缺损
trİris kolobomu

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM120200NTBTvalidated
OMIM620731NTBTvalidated
ICD-10Q13.0Especificvalidated
ICD-11LA11.4Especificvalidated
MONDO0020356Evalidated
UMLSC0266551Evalidated
GARD1434Evalidated
MedDRA10052642Evalidated

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

5 direct
GeneAssociationStatusHGNCEnsemblOMIMLocusNameSource of validation
FZD5Disease-causing germline mutation(s) (gain of function) inAssessedHGNC:4043ENSG000001632516017232q33.3frizzled class receptor 526908622[PMID]
SALL2Disease-causing germline mutation(s) (loss of function) inAssessedHGNC:10526ENSG0000016582160221914q11.2spalt like transcription factor 224412933[PMID]
ABCB6Disease-causing germline mutation(s) inAssessedHGNC:47ENSG000001156576054522q35ATP binding cassette subfamily B member 6 (LAN blood group)22226084[PMID]
ACTG1Disease-causing germline mutation(s) inAssessedHGNC:144ENSG0000018400910256017q25.3actin gamma 128493397[PMID]
PAX6Disease-causing germline mutation(s) inAssessedHGNC:8620ENSG0000000737260710811p13paired box 612721955[PMID]_16604056[PMID]
5

Prevalence and incidence

1 record
TypeClassValueAreaQualificationValidationSource
Point prevalence1-9 / 100 0003.5 / 100 000WorldwideValue and classValidatedORPHANET

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