raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:228390

Frontonasal dysplasia-alopecia-genital anomalies syndrome

Synonyms: ALX4-related FNDAG · Craniofrontonasal dysplasia with alopecia and hypogonadism · Frontonasal dysplasia type 2 · Frontonasal dysplasia with alopecia and genital abnomality

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

A rare, genetic, frontonasal dysplasia characterized by coronal craniosynostosis, large skull defect with aplasia of ethmoid and nasal bones, hypertelorism, severely depressed nasal bridge and bifid nasal tip in association with total alopecia and hypogonadism. Intellectual disability is mild to moderate.

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Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enFrontonasal dysplasia-alopecia-genital anomalies syndromeALX4-related FNDAG · Craniofrontonasal dysplasia with alopecia and hypogonadism · Frontonasal dysplasia type 2 · Frontonasal dysplasia with alopecia and genital abnomality
frSyndrome de dysplasie frontonasale-alopécie-anomalies génitalesDysplasie fronto-nasale type 2 · FNDAG associée à ALX4 · Syndrome de dysplasie cranio-fronto-nasale-alopécie-hypogonadisme
deFrontonasale Dysplasie-Alopezie-Genitalanomalien-SyndromALX4-abhängige FNDAG · Fronto-nasale Dysplasie Typ 2 · Fronto-nasale Dysplasie mit Alopezie und Genitalfehlbildungen · Kranio-fronto-nasale Dysplasie mit Alopezie und Hypogonadismus
esSíndrome de displasia frontonasal-alopecia-anomalías genitalesDisplasia craneofrontonasal con alopecia e hipogonadismo · Displasia frontonasal con alopecia y anomalías genitales · Displasia frontonasal tipo 2 · FNDAG asociado a ALX4
itDisplasia frontonasale - alopecia - anomalia dei genitaliDisplasia cranio-fronto-nasale con alopecia e ipogonadismo · Displasia frontonasale con alopecia e anomalie genitali · FNDAG associata a ALX4
nlFrontonasale dysplasie - alopecie - genitale anomalieën-syndroomALX4-gerelateerde FNDAG · Craniofrontonasale dysplasie met alopecie en hypogonadisme · Frontonasale dysplasie met alopecie en genitale afwijking · Frontonasale dysplasie type 2
ptSíndrome de displasia frontonasal-alopecia-anomalias genitaisFNDAG ALX4-relacionada · Displasia craniofrontonasal com alopecia e hipogonadismo · Displasia frontonasal e anomalia genital · Displasia frontonasal tipo 2
plDysplazja czołowo-nosowa z łysieniem i wadą narządów płciowychDysplazja czaszkowo-czołowo-nosowa z łysieniem i hipogonadyzmem · Dysplazja czołowo-nosowa z łysieniem i nieprawidłowością narządów płciowych · FNDAG ziązane z ALX4
csFrontonazální dysplázie s alopecií a anomálií genitáluALX4-vázaná FNDAG · Kraniofrontonazální dysplázie s alopecií a hypogonadismem · Frontonazální dysplázie s alopecií a abnormalitou genitálu
ukСиндром лобно-носової дисплазії-алопеції-генітальних аномалійFNDAG, повязані з ALX4 · Краніофронтоносальна дисплазія з алопецією та гіпогонадизмом · Фронтоназальна дисплазія 2 типу · Фронтоназальна дисплазія з алопецією та аномалією статевих органів
zh额鼻发育不良-脱发-生殖器异常综合征额鼻发育不良伴脱发和性腺功能减退症
trFrontonazal displazi-alopesi-genital anomaliler sendromuALX4-ilişkili FNDAG · Frontonazal displazi tip 2 · Alopesi ve hipogonadizm ile seyreden kraniyofrontonazal displazi · Alopesi ve genital anormallik ile seyreden frontonazal displazi

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM613451Evalidated
ICD-10Q87.0NTBTattributedvalidated
MONDO0013268Evalidated
UMLSC4510728Evalidated

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 (7):

No children.

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Genes

1 direct
GeneAssociationStatusHGNCEnsemblOMIMLocusNameSource of validation
ALX4Disease-causing germline mutation(s) inAssessedHGNC:450ENSG0000005285060542011p11.2ALX homeobox 423401352[PMID]
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Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Cases/families5 casesWorldwideCase(s)Validated24668755[PMID]
Point prevalence<1 / 1 000 000—WorldwideClass onlyValidatedORPHANET

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

30 annotations · validated 2016-06-01
HPOTerm (as annotated by Orphanet)Diagnostic
Very frequent (99-80%)
HP:0001596Alopecia
HP:0000463Anteverted nares
HP:0011803Bifid nose
HP:0000248Brachycephaly
HP:0000289Broad philtrum
HP:0004440Coronal craniosynostosis
HP:0000028Cryptorchidism
HP:0005280Depressed nasal bridge
HP:0002084Encephalocele
HP:0000316Hypertelorism
HP:0000135Hypogonadism
HP:0001256Intellectual disability, mild
HP:0002342Intellectual disability, moderate
HP:0000639Nystagmus
HP:0001362Skull defect
HP:0000486Strabismus
HP:0000506Telecanthus
HP:0000430Underdeveloped nasal alae
HP:0000582Upslanted palpebral fissure
Frequent (79-30%)
HP:0000164Abnormality of the dentition
HP:0002335Agenesis of cerebellar vermis
HP:0001274Agenesis of corpus callosum
HP:0000698Conical tooth
HP:0002213Fine hair
HP:0002007Frontal bossing
HP:0001511Intrauterine growth retardation
HP:0000369Low-set ears
HP:0000568Microphthalmia
HP:0001562Oligohydramnios
HP:0000046Small scrotum

Run the differential on the 12 obligate / very frequent terms

Annotation source: 19692347[PMID]

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Sources for this card