raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:3374

Unilateral ocular duplication

Synonyms: Triophthalmia · Triopia · Unilateral diplophthalmia · Unilateral diplophthalmos

Type
Morphological anomaly
Group
Disorder
Inheritance
Autosomal dominant
Age of onset
Neonatal
Status
active

A rare developmental defect during embryogenesis characterized by unilateral duplication of an eye which may appear as a synophthalmic eye in a single orbit or as two separate unilateral eyes, each in a separate orbit. The malformation is always associated with other anomalies of the central nervous system (such as porencephaly, meningocele, or arachnoidal cysts) and with craniofacial abnormalities. A proboscis is often found. Clinically, moderate intellectual disability and epilepsy are typical.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enUnilateral ocular duplicationTriophthalmia · Triopia · Unilateral diplophthalmia · Unilateral diplophthalmos
frTriopieDiplophtalmie unilatérale · Duplication oculaire unilatérale · Triophtalmie
deUnilaterale okuläre DuplikationDiplophthalmie, unilaterale · Triophthalmie · Triopie
esDuplicación ocular unilateralTrioftalmia · Triopía
itDuplicazione oculare monolateraleDiploftalmia monolaterale · Diploftalmo monolaterale · Trioftalmia · Triopia
nlUnilaterale oculaire duplicatieTrioftalmie · Triopie · Unilaterale diploftalmie · Unilaterale diplophthalmos
ptDuplicação ocular unilateralDiploftlamia unilateral · Diploftlamos unilateral · Trioftalmia · Triopia
plTriopiaJednostronne zdwojenie oka
csTriopie= en
ukОдностороння окулодуплікаціяТриофтальмія · Тріопія · Одностороння диплофтальмія · Односторонній диплофтальм
zh斜视
trTriopia

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
ICD-10Q15.8NTBTattributedvalidated
ICD-11LA10.YNTBTattributedvalidated
MONDO0031322Evalidated
MONDO31322Evalidated
UMLSC5816687Evalidated
GARD5286Evalidated

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

0 direct

Orphanet records no gene directly on this code.

5

Prevalence and incidence

1 record
TypeClassValueAreaQualificationValidationSource
Point prevalence<1 / 1 000 000—WorldwideClass onlyValidatedORPHANET_17558850[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

18 annotations · validated 2016-06-01
HPOTerm (as annotated by Orphanet)Diagnostic
Very frequent (99-80%)
HP:0000534Abnormal eyebrow morphology
HP:0000615Abnormal pupil morphology
HP:0000235Abnormality of the fontanelles or cranial sutures
HP:0000951Abnormality of the skin
HP:0000581Blepharophimosis
HP:0000175Cleft palate
HP:0000268Dolichocephaly
HP:0002084Encephalocele
HP:0000324Facial asymmetry
HP:0002007Frontal bossing
HP:0000316Hypertelorism
HP:0000612Iris coloboma
HP:0001601Laryngomalacia
HP:0000256Macrocephaly
HP:0000161Median cleft lip
HP:0000482Microcornea
HP:0100629Midline facial cleft
HP:0001561Polyhydramnios

Run the differential on the 12 obligate / very frequent terms

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Sources for this card