raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:2934

Polysyndactyly-cardiac malformation syndrome

Synonyms: Bonneau syndrome

Type
Malformation syndrome
Group
Disorder
Inheritance
Autosomal recessive
Age of onset
Infancy, Neonatal
Status
active

A rare, life-threatening developmental defect during embryogenesis characterized by polysyndactyly of fingers and toes as well as complex congenital heart defects (e.g. atrioventricular septal defects, aortic dextroposition, single ventricle, hypo- or hypertrophy of one side of the heart). Additional features may include dysmorphic traits (large fontanel, high forehead, ptosis, hypertelorism, epicanthus, low-set malformed ears, prominent root of the nose, bulbous nose, anteverted nares, long and smooth philtrum, thin upper lip, micrognathism, hirsutism, single transverse crease) nail hypoplasia, phalange agenesis/hypoplasia, flexion contractures, polysplenia, multiple hepatic/renal cysts, atrophic biliary vesicle, ductal plate malformation and genital anomalies (e.g. micropenis, undescended testes, hypoplastic scrotum). The syndrome is usually fatal in utero or in infancy, but survival cases have been reported.

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Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enPolysyndactyly-cardiac malformation syndromeBonneau syndrome
frSyndrome de polysyndactylie-malformation cardiaqueSyndrome de Bonneau
dePolysyndaktylie-Herzfehlbildung-SyndromBonneau-Syndrom
esSíndrome de polisindactilia-malformación cardíacaSíndrome de Bonneau
itSindrome polisindattilia-cardiopatiaSindrome di Bonneau
nlPolysyndactylie - hartmalformatie-syndroomSyndroom van Bonneau
ptSíndrome de polissindactilia-malformação cardíacaSíndrome Bonneau
plPolisyndaktylia - wada sercaZespół Bonneau
csSyndrom zahrnující polysyndaktylii a srdeční malformaciBonneauův syndrom
ukСиндром полісиндактилії-вади серцяСиндром Бонно
zh多指(趾)并指(趾)畸形-心脏畸形综合征Bonneau综合征
trPolisindaktili-kardiyak malformasyon sendromuBonneau sendromu

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM263630Evalidated
ICD-10Q87.8NTBTattributedvalidated
MONDO0009900Evalidated
MeSHC564875Evalidated
UMLSC1849719Evalidated
GARD4428Evalidated

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 (2):

No children.

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Genes

0 direct

Orphanet records no gene directly on this code.

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Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Cases/families8 casesWorldwideCase(s)Validated12749069[PMID]_19400539[PMID]
Point prevalence<1 / 1 000 000—WorldwideClass onlyValidatedORPHANET_12749069[PMID]_19400539[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.

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HPO phenotypes

18 annotations · validated 2025-04-16
HPOTerm (as annotated by Orphanet)Diagnostic
Very frequent (99-80%)
HP:0001627Abnormal heart morphology
HP:0010442Polydactyly
HP:0001159Syndactyly
Frequent (79-30%)
HP:0000463Anteverted nares
HP:0001631Atrial septal defect
HP:0000414Bulbous nose
HP:0000316Hypertelorism
HP:0000369Low-set ears
HP:0006563Malformation of the hepatic ductal plate
HP:0000347Micrognathia
HP:0001561Polyhydramnios
HP:0001629Ventricular septal defect
Occasional (29-5%)
HP:0000518Cataract
HP:0000286Epicanthus
HP:0000568Microphthalmia
HP:0000803Renal cortical cysts
HP:0001636Tetralogy of Fallot
HP:0007902Vitreous hemorrhage

Run the differential on the 3 obligate / very frequent terms

Annotation source: 35602397[PMID]

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Sources for this card