raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:1681

Diprosopus

Synonyms: Craniofacial duplication · Diprosopia

Type
Morphological anomaly
Group
Disorder
Inheritance
No data available
Age of onset
Antenatal
Status
active

Diprosopus is a rare, life-threatening developmental defect during embryogenesis, and a subtype of conjoined twins, characterized by partial or complete duplication of the facial structures on a single head, neck, trunk and body. It may be associated with congenital anomalies involving the cardiovascular, gastrointestinal, respiratory and central nervous systems. Cleft lip and palate have been reported in rare cases.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enDiprosopusCraniofacial duplication · Diprosopia
frDiprosopie
deDiprosopusDiprosopie · Doppelgesicht
esDiprosopusDiprosopia · Duplicación cráneofacial
itDiprosopia
nlDiprosopusCraniofaciale duplicatie · Diprosopie
ptDiprosopia
plDiprosopia= en
csDiprozopie= en
ukDiprosopusЧерепно-лицьова дуплікація · Дипросопія
zh双面畸形颅面重复畸形
trDiprosopusDiprosopi · Kraniyofasiyal duplikasyon

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
ICD-10Q89.4NTBTattributedvalidated
MONDO0015672Evalidated
UMLSC0266731Evalidated
GARD1876Evalidated

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

0 direct

Orphanet records no gene directly on this code.

5

Prevalence and incidence

3 records
TypeClassValueAreaQualificationValidationSource
Prevalence at birth1-9 / 1 000 0000.2 / 100 000ArgentinaValue and classValidated27704687[PMID]
Cases/families33 casesWorldwideCase(s)Validated27704687[PMID]
Point prevalence<1 / 1 000 000—WorldwideClass onlyValidatedORPHANET_27704687[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

10 annotations · validated 2016-06-01
HPOTerm (as annotated by Orphanet)Diagnostic
Very frequent (99-80%)
HP:0001671Abnormal cardiac septum morphology
HP:0000377Abnormal pinna morphology
HP:0007703Abnormality of retinal pigmentation
HP:0000478Abnormality of the eye
HP:0000271Abnormality of the face
HP:0000366Abnormality of the nose
HP:0000504Abnormality of vision
HP:0002323Anencephaly
HP:0000175Cleft palate
Frequent (79-30%)
HP:0100335Non-midline cleft of the upper lip

Run the differential on the 9 obligate / very frequent terms

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Sources for this card