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Updated: Aug 19, 2026

Quantitative Magnetic Resonance Imaging of Skeletal Muscle Disease
Published on: December 18, 2016
Myositis in children
1Pediatrics, Mayo Clinic, Rochester, Minnesota 55905, USA. reed.ann18@Mayo.edu
Insights
Recent advances improve understanding and treatment of childhood idiopathic inflammatory myositis, primarily juvenile dermatomyositis and juvenile polymyositis. New insights into epidemiology, pathogenesis, and therapies offer better care with reduced toxicity.
Area of Science:
- Pediatric Rheumatology
- Immunology
- Genetics
Background:
- Idiopathic inflammatory myositis in children encompasses juvenile dermatomyositis and juvenile polymyositis.
- Recent research has significantly expanded knowledge on these conditions.
Purpose of the Study:
- To review recent findings on the epidemiology, pathogenesis, diagnosis, and treatment of childhood idiopathic inflammatory myositis.
- To highlight advancements in understanding immune responses and genetic associations.
Main Methods:
- Literature review of recent publications on pediatric idiopathic inflammatory myositis.
- Synthesis of new data on disease onset, triggers, regional variations, and genetic factors.
Main Results:
- New information on epidemiology, pathogenesis, and clinical presentation.
- Emerging data on immune response gene associations and chimerism.
- Advances in clinical evaluation, outcome assessment, and treatment protocols.
Conclusions:
- Significant progress has been made in understanding and managing childhood idiopathic inflammatory myositis.
- New treatment protocols aim for more effective therapy with reduced toxicity.
- Continued research is essential for further understanding and improved patient care.
Abstract:
Idiopathic inflammatory myositis in children includes multiple disease entities, but is primarily made up of juvenile dermatomyositis and, to a lesser degree, juvenile polymyositis. Much new information has been published in the last few years about these diseases, including the epidemiology, pathogenesis, clinical diagnosis, and outcomes and treatment. This includes information on onset of symptoms, potential inciting agents, and regional differences. Exciting data have emerged in our understanding of the immune response gene associations and the description of chimerism in children with these disorders. Finally, new advances in clinical evaluations and outcomes have been described as well as new treatment protocols to provide a more effective therapy with less toxicity. Continued investigation is needed to further understand these diseases, but great strides are being made in our understanding and ability to care for children with idiopathic inflammatory myositis.
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