Related Experiment Video
Updated: May 6, 2026
Detection of Anti-MDA5 Autoantibodies Using HeLa Cells and Immunocytochemistry with Light Microscopy
Published on: October 31, 2025
Clinical features and disease course of patients with juvenile dermatomyositis
Peter J Gowdie1, Roger C Allen, Andrew J Kornberg
1Department of General Medicine, Rheumatology Service, Royal Children's Hospital, Melbourne, Victoria, Australia.
Insights
This study describes juvenile dermatomyositis (JDM) in Australian children, noting that magnetic resonance imaging (MRI) now replaces invasive tests for diagnosis. Early use of disease-modifying anti-rheumatic drugs is common.
Area of Science:
- Pediatric Rheumatology
- Autoimmune Diseases
- Clinical Research
Background:
- Juvenile dermatomyositis (JDM) is a rare autoimmune disease affecting children.
- Understanding JDM clinical features and treatment evolution is crucial for patient management.
Purpose of the Study:
- To characterize the clinical presentation and disease course of JDM patients in Australia.
- To analyze shifts in diagnostic and therapeutic strategies for JDM over time.
Main Methods:
- Retrospective review of 57 JDM patients diagnosed at a tertiary pediatric center (1989-2010).
- Analysis of clinical data, laboratory results, and diagnostic imaging (MRI, EMG).
- Examination of treatment modalities including corticosteroids, methotrexate, and other immunosuppressants.
Main Results:
- Common symptoms at diagnosis included weakness (95%) and rash (100%).
- Calcinosis developed in 18% of patients over time.
- Magnetic resonance imaging (MRI) became the preferred diagnostic tool, replacing muscle biopsy and electromyography (EMG) in later years.
- Corticosteroids and methotrexate were frequently used treatments.
Conclusions:
- Australian JDM patients share characteristics with international cohorts.
- MRI has largely superseded invasive diagnostic methods for JDM.
- Early initiation of disease-modifying anti-rheumatic drugs (DMARDs) is a prevalent treatment approach.
Objective:
To describe the clinical features and course of a cohort of patients with juvenile dermatomyositis (JDM) at a tertiary referral pediatric centre in Australia and examine changes in diagnostic and therapeutic approach over time.
Methods:
Retrospective review of patients diagnosed with JDM at the Royal Children's Hospital, Melbourne, between 1989 and 2010.
Results:
Fifty-seven patients were identified. The female : male ratio was 2 : 1 and median age at diagnosis was 7.1 years (2.2-15.3). At diagnosis, 95% had weakness, all had typical rash and 68% had nailfold capillary changes. Calcinosis was not present in any patients at diagnosis and occurred in 18% over time. Creatine kinase, lactate dehydrogenase, aspartate aminotransferase, alanine aminotransferase and aldolase levels were abnormal in 65%, 92%, 88%, 58% and 100%, respectively. Magnetic resonance imaging (MRI) was abnormal in 97% of patients, electomyograph (EMG) in 83% and muscle biopsy in all four patients in whom it was performed. MRI was used in 86% (24/28) of patients diagnosed after 2000. Muscle biopsy was used in four and EMG in no patients over the same period. Treatment used throughout the disease course included oral steroids (93%), high-dose pulse intravenous steroids (82%), methotrexate (63%), intravenous immunoglobulin (32%) and cyclosporin (18%). The disease was monophasic in 46.7% (21/45), polyphasic in 17.7% (8/45) and chronic in 35.5% (16/45).
Conclusions:
Australian patients with JDM have similar characteristics to previously described cohorts. In practice, MRI has replaced the invasive diagnostic tests included in the Bohan and Peter criteria for the diagnosis of JDM. The early use of disease-modifying anti-rheumatic drugs has become the most common treatment approach.
Related Concept Videos
01:27Myocarditis II: Clinical Features and Diagnostic Tests
01:20Inflammatory Bowel Disease IV: Clinical Manifestations
01:30Toxidromes: Clinical Features
01:22Rheumatic Heart Disease II: Clinical Manifestations and Diagnostic Studies
01:20COPD: Pathogenesis and Clinical Features
The primary cause for the onset of COPD is cigarette smoking and exposure to air pollution. These hazardous factors initiate a chain reaction within the lungs, resulting in chronic inflammation, damage to the airways, and a...
01:26Nephrotic Syndrome II : Assessment and Medical Management