raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:398189

Focal facial dermal dysplasia type IV

Synonyms: FFDD type IV · FFDD4 · Focal facial dermal dysplasia 4 · Focal facial preauricular dysplasia

Type
Clinical subtype
Group
Subtype of disorder
Inheritance
Autosomal recessive
Age of onset
Antenatal, Neonatal
Status
active

Focal facial dermal dysplasia type IV (FFDD4) is a rare focal facial dysplasia (FFDD), characterized by congenital isolated preauricular and/or cheek blister scar-like lesions.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enFocal facial dermal dysplasia type IVFFDD type IV · FFDD4 · Focal facial dermal dysplasia 4 · Focal facial preauricular dysplasia
frDysplasie dermique faciale focale type IVDysplasie dermique faciale focale 4 · Dysplasie faciale focale préauriculaire · FFDD type IV · FFDD4
deFokale faziale dermale Dysplasie Typ IVFFDD Typ IV · FFDD4 · Fokale faziale dermale Dysplasie 4 · Fokale faziale präaurikuläre Dysplasie
esDisplasia dérmica focal facial tipo IVDisplasia dérmica focal facial 4 · Displasia focal facial preauricular · FFDD tipo IV · FFDD4
itDisplasia dermica facciale focale, tipo IVDisplasia dermica facciale focale 4 · Displasia facciale focale preauricolare · FFDD, tipo IV · FFDD4
nlFocale faciale dermale dysplasie type IVFFDD type IV · FFDD4 · Focale faciale dermale dysplasie 4 · Focale faciale pre-auriculaire dysplasie
ptDisplasia dérmica facial focal tipo IVDisplasia dérmica facial focal tipo 4 · Displasia facial focal preauricular · FFDD tipo IV · FFDD4
plOgniskowa dysplazja skóry twarzy typu IVFFDD typu IV · FFDD4 · Ogniskowa dysplazja skóry twarzy 4 · Ogniskowa przeduszna dysplazja skóry twarzy
csFokální faciální dermální dysplázie, typ IVFFDD typ IV · FFDD4 · Fokální faciální dermální dysplázie, typ 4 · Fokální faciální preaurikulární dysplázie
ukФокальна дисплазія шкіри обличчя, тип IVFFDD тип IV · FFDD4 · Фокальна дисплазія шкіри обличчя 4 · Фокальна лицьова преаурикулярна дисплазія
zh局灶性面部皮肤发育异常4型局灶性面部耳前真皮发育不良
trFokal yüz dermal displazi tip IVFFDD4 · FFDD tip IV · Fokal fasiyal dermal displazi 4 · Fokal fasiyal preoriküler displazi

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM614974Evalidated
ICD-10Q82.8NTBTattributedvalidated
ICD-11LD27.0YNTBTattributedvalidated
MONDO0013997Evalidated
UMLSC3554246Evalidated

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

1 direct
GeneAssociationStatusHGNCEnsemblOMIMLocusNameSource of validation
CYP26C1Disease-causing germline mutation(s) (loss of function) inAssessedHGNC:20577ENSG0000018755360842810q23.33cytochrome P450 family 26 subfamily C member 123161670[PMID]
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Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Cases/families21 casesWorldwideCase(s)Validated23161670[PMID]
Point prevalence<1 / 1 000 000—WorldwideClass onlyValidatedORPHANET_23161670[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

17 annotations · validated 2017-06-19
HPOTerm (as annotated by Orphanet)Diagnostic
Very frequent (99-80%)
HP:0008066Abnormal blistering of the skin
HP:3000019Abnormality of buccal mucosa
HP:0004426Abnormality of the cheek
Frequent (79-30%)
HP:0100494Abnormal mast cell morphology
HP:0011124Abnormality of epidermal morphology
HP:0000175Cleft palate
HP:0000204Cleft upper lip
HP:0007359Focal-onset seizure
HP:0025167Fragmented elastic fibers in the dermis
HP:0001028Hemangioma
HP:0001269Hemiparesis
HP:0000238Hydrocephalus
HP:0002170Intracranial hemorrhage
HP:0000252Microcephaly
HP:0003764Nevus
HP:0100699Scarring
HP:0000331Short chin

Run the differential on the 3 obligate / very frequent terms

Annotation source: 16530710[PMID]_23161670[PMID]

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Sources for this card