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Start free with EleplanJuvenile polymyositis
ORPHA:93568Disease
Also called Juvenile PM
What it is
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.
Key facts
- Prevalence
- <1 / 1 000 000
- Age of onset
- Adolescent, Childhood
- Classified as
- Disease
Prevalence figures describe populations, not individuals, and are often estimates from a single study. Where the figure is an incidence or a birth prevalence, it says so.
ICD-10 codes
ICD-10 has no distinct code for most rare diseases, so many are filed under the nearest available one. A shared code identifies the group, not this disease — the ORPHAcode above is what identifies it.
Related health topics
Reached through the ICD-10 categories this disease is filed under, so these describe the broader group rather than this disease specifically.
Cross-references
Orphadata Science: Free access data from Orphanet. © INSERM 1999. Data version 2026-06-23. Available under CC BY 4.0. This is a reference, not medical advice.
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