raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:141214

Isolated congenital syngnathia

Synonyms: Isolated congenital maxillomandibular fusion

Type
Malformation syndrome
Group
Disorder
Age of onset
Neonatal
Status
active

Isolated congenital syngnathia is a very rare developmental defect during embryogenesis disorder characterized by varying degrees of congenital fusion (ranging from simple mucosal adhesions to extensive bony fusion) of mandible to maxilla that is not associated with any other malformations. Patients present with mouth opening limitation (which could range from severe to minimal restriction) that typically results in feeding, swallowing and/or respiratory difficulties which may lead to failure to thrive, malnutrition and/or temporomandibular joint ankylosis.

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Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enIsolated congenital syngnathiaIsolated congenital maxillomandibular fusion
frSyngnathie congénitale isoléeFusion maxillo-mandibulaire congénitale isolée
deSyngnathie, isolierte kongenitaleMaxillomandibuläre Fusion, isolierte kongenitale
esSignatia congénita aisladaFusión maxilomandibular congénita aislada
itSignazia congenita isolata
nlGeïsoleerde congenitale syngnathieGeïsoleerde congenitale maxillomandibulaire fusie
ptSingnatia congénita
plWrodzony zrost szczęki i żuchwyWrodzony zrost szczękowo-żuchwowy
csVrozená syngnatieVrozená maxilomandibulární fúze
ukІзольована вроджена сингнатіяІзольоване вроджене щелепно-лицьове зрощення
zh孤立性先天连颌畸形孤立性先天性上颌骨融合
trİzole Doğumsal singnatiİzole doğumsal maksillomandibular füzyon

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
ICD-10Q67.4NTBTattributedvalidated
ICD-11LA5YNTBTindexvalidated
MONDO0015409Evalidated
UMLSC4706392Evalidated
GARD19962Evalidated

E exact · NTBT this ORPHAcode is narrower than the target · BTNT broader than the target · ND not decided.

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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

0 records

No prevalence record in this release.

6

HPO phenotypes

Orphanet has no HPO annotation for this code in this release.

7

Sources for this card