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Juvenile dermatomyositis induced by toxoplasmosis
Journal of Child Neurology
|April 1, 1987
Summary
A child with dermatomyositis rapidly improved with toxoplasmosis treatment, suggesting infection as a cause. This case highlights the importance of considering toxoplasmosis in pediatric inflammatory myopathies.
Area of Science:
- Pediatric Rheumatology
- Infectious Diseases
- Clinical Myology
Background:
- Dermatomyositis is an idiopathic inflammatory myopathy.
- Toxoplasmosis is a parasitic infection with diverse clinical manifestations.
Observation:
- A 10-year-old girl presented with dermatomyositis symptoms after cat exposure.
- High toxoplasmosis titers (IgM positive) were detected.
- Initial treatment with prednisone and azathioprine showed minimal improvement.
Findings:
- Specific treatment for toxoplasmosis (pyrimethamine and sulfadiazine) led to rapid clinical recovery.
- Muscle biopsy normalized, and symptoms resolved within a year.
- Immune function tests revealed no significant long-term deficiencies.
Implications:
- Acute toxoplasmosis can mimic idiopathic dermatomyositis in immunocompetent children.
- Prompt diagnosis and targeted antiparasitic therapy are crucial for favorable outcomes.
- This case underscores the need to investigate infectious etiologies in pediatric inflammatory myopathies.