raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:617919

F12-associated cold autoinflammatory syndrome

Synonyms: FACAS

Type
Disease
Group
Disorder
Inheritance
Autosomal dominant
Age of onset
Neonatal
Status
active

A rare genetic autoinflammatory syndrome with skin involvement characterized by cold-induced urticarial rash without angioedema starting in infancy and systemic inflammation due to autosomal dominant mutations in the coagulation factor (12 (F-12) gene. In addition to cold-induced, non-pruritic urticarial rash, patients present with headache, mild to severe arthralgia, fatigue, subfebrile evening temperature, chills, and malaise. Systemic symptoms worsen during the cold season and over the years.

1

Names in Orphadata languages

10 of 12 languages
LangNameSynonyms
enF12-associated cold autoinflammatory syndromeFACAS
frSyndrome auto-inflammatoire au froid associé à F12
deF12-assoziiertes kälteinduziertes autoinflammatorisches Syndrom= en
esSíndrome autoinflamatorio por frío asociado a F12= en
itSindrome autoinfiammatoria indotta dal freddo correlata a F12= en
nlF12-geassocieerd auto-inflammatoir syndroom door koude= en
ptSíndrome autoinflamatória do frio F12-associada= en
plIndukowany zimnem zespół autozapalny związany z F12= en
csAutoinflamatorní syndrom spojený s chladem a genem F12= en
ukF12-асоційований холодовий аутозапальний синдром= en

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
ICD-10L50.2NTBTattributedvalidated
ICD-11EB01.1NTBTattributedvalidated
MONDO0850053Evalidated
UMLSC5681829Evalidated

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 (3):

No children.

4

Genes

1 direct
GeneAssociationStatusHGNCEnsemblOMIMLocusNameSource of validation
F12Disease-causing germline mutation(s) inAssessedHGNC:3530ENSG000001311876106195q35.3coagulation factor XII31924766[PMID]
5

Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Cases/families4 casesWorldwideCase(s)Validated31924766[PMID]
Point prevalence<1 / 1 000 000—WorldwideClass onlyValidated31924766[PMID]_ORPHANET

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

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

7

Sources for this card