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Serial magnetic resonance imaging in juvenile dermatomyositis--delayed normalization
1Children's University Hospital, Würzburg, Germany.
Rheumatology International
|January 1, 1994
Summary
Juvenile dermatomyositis (JDM) diagnosis uses objective findings. In a JDM case, MRI confirmed myositis but lagged behind clinical recovery, suggesting delayed response monitoring.
Area of Science:
- Pediatric Rheumatology
- Medical Imaging
Background:
- Juvenile dermatomyositis (JDM) diagnosis traditionally requires multiple objective findings.
- Magnetic resonance imaging (MRI) is an established objective criterion for JDM assessment and monitoring.
Observation:
- A 6-year-old girl with JDM presented with rash and proximal muscle weakness.
- MRI revealed increased T2 signal in proximal muscles, consistent with myositis, alongside elevated creatinine kinase (CK) levels.
Findings:
- MRI initially showed myositis exacerbation despite steroid therapy.
- However, MRI improvement lagged by 2 months behind clinical and laboratory normalization (muscle strength and CK levels).
Implications:
- MRI may not reflect immediate therapeutic response in JDM.
- Clinicians should consider this potential delay when using MRI for monitoring JDM treatment efficacy.