raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:85414

Systemic-onset juvenile idiopathic arthritis

Synonyms: Still disease · Systemic-onset JIA

Type
Disease
Group
Disorder
Inheritance
Multigenic/multifactorial, Unknown
Age of onset
Childhood
Status
active

A rare pediatric rheumatological disease characterized by the variable occurrence of chronic arthritis, intermittent high spiking fever, maculopapular rash during fever episodes, hepatomegaly and/or splenomegaly, lymphadenopathy, and serositis.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enSystemic-onset juvenile idiopathic arthritisStill disease · Systemic-onset JIA
frArthrite juvénile idiopathique systémiqueAJI systémique · Maladie de Still
deArthritis, idiopathische juvenile, systemischeStill-Krankheit · sJIA
esArtritis idiopática juvenil de inicio sistémicoAIJ de inicio sistémico · Enfermedad de Still
itArtrite idiopatica giovanile a esordio sistemicoJIA a esordio sistemico · Malattia di Still
nlJuveniele idiopathische artritis met systemische aanvangJIA met systemische aanvang · Ziekte van Still
ptArtrite juvenil idiopática de início sistémicoDoença Still · Febre persistente indeterminada
plUogólnione idiopatyczne młodzieńcze zapalenie stawów o wczesnym początkuChoroba Stilla · Uogólnione zapalenie wielostawowe
csSystémová forma juvenilní idiopatické artritidyStillova choroba · Systémová polyartritida · Systémová JIA
ukСистемний ювенільний ідіопатичний артритХвороба Стілла · Системний початок ЮРА
zh全身型幼年特发性关节炎系统性多关节炎
trSistemik başlangıçlı jüvenil idiyopatik artritStil hastalığı · Sistemik başlangıçlı JIA · Sistemik poliartrit

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM604302Evalidated
OMIM618795BTNTvalidated
ICD-10M08.2Especificvalidated
ICD-11FA24.4Especificvalidated
MONDO0019434Evalidated
UMLSC0087031Evalidated
GARD10966Evalidated
MedDRA10042061Evalidated

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 (2):

No children.

4

Genes

4 direct
GeneAssociationStatusHGNCEnsemblOMIMLocusNameSource of validation
LACC1Disease-causing germline mutation(s) inAssessedHGNC:26789ENSG0000017963061340913q14.11laccase domain containing 125220867[PMID]
HLA-DRB1Major susceptibility factor inNot yet assessedHGNC:4948ENSG000001961261428576p21.32major histocompatibility complex, class II, DR beta 126598658[PMID]
IL6Major susceptibility factor inNot yet assessedHGNC:6018ENSG000001362441476207p15.3interleukin 6
MIFMajor susceptibility factor inNot yet assessedHGNC:7097ENSG0000024097215362022q11.23macrophage migration inhibitory factor
5

Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Point prevalence1-9 / 100 0003.1 / 100 000WorldwideValue and classValidated24210707[PMID]
Annual incidence1-9 / 1 000 0000.6 / 100 000WorldwideValue and classValidated24210707[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

22 annotations · validated 2024-10-07
HPOTerm (as annotated by Orphanet)Diagnostic
Very frequent (99-80%)
HP:0002829Arthralgia
HP:0001369Arthritis
HP:0002960Autoimmunity
HP:0011227Elevated circulating C-reactive protein concentration
HP:0003565Elevated erythrocyte sedimentation rate
HP:0001945Fever
HP:0001386Joint swelling
HP:0005681Juvenile rheumatoid arthritis
HP:0000988Skin rash
Frequent (79-30%)
HP:0002716Lymphadenopathy
Occasional (29-5%)
HP:0002027Abdominal pain
HP:0012122Anterior uveitis
HP:0004890Elevated pulmonary artery pressure
HP:0000099Glomerulonephritis
HP:0001510Growth delay
HP:0002240Hepatomegaly
HP:0003281Increased circulating ferritin concentration
HP:0033430Non-infectious meningitis
HP:0000938Osteopenia
HP:0001701Pericarditis
HP:0002202Pleural effusion
HP:0001744Splenomegaly

Run the differential on the 9 obligate / very frequent terms

Annotation source: 27392503[PMID]

7

Sources for this card