raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:247868

NLRP12-associated hereditary periodic fever syndrome

Synonyms: FCAS2 · Familial cold autoinflammatory syndrome type 2 · NAPS12

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

A rare autoinflammatory syndrome characterized by episodic and recurrent periods of fever combined with various systemic manifestations such as myalgia, arthralgia, joint swelling, urticaria, headache and skin rash. Common trigger of these episodes is cold.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enNLRP12-associated hereditary periodic fever syndromeFCAS2 · Familial cold autoinflammatory syndrome type 2 · NAPS12
frSyndrome de fièvre périodique héréditaire lié à NLRP12NAPS12 · SFAF2 · Syndrome familial auto-inflammatoire au froid type 2 · FCAS2
deNLRP12-assoziiertes hereditäres Periodisches FiebersyndromAutoinflammatorisches Syndrom, kälteinduziertes, familiäres, Typ 2 · FCAS2 · NAPS12
esSíndrome de fiebre periódica hereditaria asociada a NLRP12FCAS2 · NAPS12 · Síndrome autoinflamatorio familiar por frío 2
itSindrome da febbre periodica ereditaria associata a NLRP12FCAS2 · NAPS12 · Sindrome autoinfiammatoria familiare da freddo 2
nlNLRP12-geassocieerde erfelijke periodieke koorts-syndroomFCAS2 · Familiaal koud auto-inflammatoir syndroom 2 · NAPS12
ptSíndrome de febre periódica hereditária associada a NLRP12Síndrome de febre epsódica familiar associada a NALP12
plDziedziczny zespół gorączki okresowej związany z NLRP12FCAS2 · NAPS12
csSyndrom NLRP12-vázané hereditární periodické horečkyFCAS2 · NAPS12 · Familiární chladový autozánětlivý syndrom, typ 2
ukNLRP12-асоційований синдром спадкової періодичної лихоманкиСімейний простудний аутозапальний синдром 2 типу · FCAS2 · NAPS12
zhNLRP12基因相关遗传性周期性发热综合征家族性寒冷性自身炎症综合征2型
trNLRP12-ilişkili kalıtsal periyodik ateş sendromuFCAS2 · NAPS12 · Ailesel soğuk otoinflamatuar sendrom tip 2

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM611762Evalidated
ICD-10E85.0NTBTattributedvalidated
ICD-114A60.YNTBTindexvalidated
MONDO0012724Evalidated
MeSHC567090Evalidated
UMLSC2673198Evalidated

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
NLRP12Disease-causing germline mutation(s) inAssessedHGNC:22938ENSG0000014240560964819q13.42NLR family pyrin domain containing 1218230725[PMID]
5

Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Cases/families19 casesWorldwideCase(s)Validated24131530[PMID]
Point prevalence<1 / 1 000 000—WorldwideClass onlyValidatedORPHANET_24131530[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

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

7

Sources for this card