raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:93568

Juvenile polymyositis

Synonyms: Juvenile PM

Type
Disease
Group
Disorder
Age of onset
Adolescent, Childhood
Status
active

A rare type of juvenile idiopathic inflammatory myopathy (IIM) characterized by an onset before 18 years of age of chronic skeletal muscle inflammation, manifesting as progressive, proximal and distal muscle weakness and atrophy.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enJuvenile polymyositisJuvenile PM
frPolymyosite juvénilePM juvénile
dePolymyositis, juvenile
esPolimiositis juvenilPM juvenil
itPolimiosite giovanilePM giovanile
nlJuveniele polymyositisJuveniele PM
ptPolimiosite juvenil
plMłodzieńcze zapalenie wielomięśnioweMłodzieńcze PM
csJuvenilní polymyozitidaJuvenilní PM
ukЮвенільний поліміозитЮвенільний PM
zh幼年型多发性肌炎幼年型PM
trJuvenil polimiyozitjüvenil PM

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
ICD-10M33.2NTBTattributedvalidated
ICD-114A41.10Especificvalidated
MONDO0019734Evalidated
UMLSC3826988Evalidated
GARD12742Evalidated
MedDRA10076673Evalidated

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 (4):

No children.

4

Genes

0 direct

Orphanet records no gene directly on this code.

5

Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Cases/families39 casesWorldwideCase(s)Validated23925923[PMID]
Point prevalence<1 / 1 000 000—WorldwideClass onlyValidated23925923[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