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[Idiopathic inflammatory myopathies in childhood. A study of 7 patients]
J Colomer Oferil1, R Vidal Sanahuja, M Pineda Marfa
1Servicio de Neuropediatría, Hospital Infantil San Juan de Dios, Barcelona.
Insights
Juvenile inflammatory myopathies, including dermatomyositis and polymyositis, can present with varied symptoms and renal issues. Effective treatment with corticosteroids and azathioprine led to remission in most pediatric cases.
Area of Science:
- Pediatric Rheumatology
- Neuromuscular Disorders
- Autoimmune Diseases
Context:
- Juvenile inflammatory myopathies (JIM) are rare autoimmune diseases affecting children.
- Dermatomyositis and polymyositis are the most common subtypes of JIM.
- Early diagnosis and treatment are crucial for optimal outcomes in pediatric patients.
Purpose:
- To review clinical characteristics, diagnostic challenges, and treatment outcomes in a cohort of pediatric patients diagnosed with inflammatory myopathies.
- To evaluate the utility of muscle biopsy in diagnosing JIM and correlating with clinical severity.
- To assess the efficacy of immunosuppressive therapy in achieving remission in children with dermatomyositis and polymyositis.
Summary:
- This study reviewed seven pediatric patients (3-12 years) with dermatomyositis (5) and polymyositis (2), all meeting Bohan and Peter criteria.
- Five patients initially presented with constitutional symptoms preceding muscle weakness; two experienced acute renal failure.
- Muscle pathology was not consistently specific for inflammatory myopathy or correlated with symptom severity. Treatment with prednisone, and azathioprine in one case, achieved complete remission in four patients.
Impact:
- Highlights the diverse clinical presentations of JIM, including extra-muscular manifestations like renal failure.
- Underscores the potential limitations of muscle biopsy in diagnosing JIM and correlating with disease activity.
- Demonstrates the effectiveness of current immunosuppressive regimens in achieving remission in pediatric inflammatory myopathies, emphasizing the importance of timely intervention.
Abstract:
Five patients with dermatomyositis and 2 with polymyositis between 3 and 12 years old are reviewed. All of them fulfil the Bohan and Peter diagnostic criteria. Five presented misery before weakness. Two presented acute renal failure. The pathologic muscular study was not always specific of inflammatory myopathy and without correlation with the degree of symptoms. Treatment which prednisone and in one patient also azathioprine resulted with complete remission in 4 patients.