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[Dermatomyositis in pediatrics]
Insights
Pediatric dermatomyositis often presents with unusual skin issues and muscle weakness, leading to diagnostic challenges. Early identification and treatment with prednisone show promising results for children with this condition.
Area of Science:
- Pediatrics
- Rheumatology
- Dermatology
Background:
- Dermatomyositis is an idiopathic inflammatory myopathy affecting children.
- Cutaneous manifestations are often the initial and atypical signs.
- Diagnostic confusion with other autoimmune diseases like systemic lupus erythematosus is common.
Purpose of the Study:
- To describe the clinical presentation and diagnostic challenges of childhood dermatomyositis.
- To evaluate the utility of diagnostic tests and treatment outcomes.
Main Methods:
- Retrospective review of 19 children diagnosed with dermatomyositis.
- Analysis of clinical manifestations, laboratory findings (CPK, aldolase, TGO), electromyography, and muscle biopsy.
- Assessment of diagnostic accuracy and treatment response to prednisone.
Main Results:
- Atypical skin disorders were the initial manifestation in most cases.
- Proximal myopathy was consistently observed.
- Correct diagnosis was delayed in many cases, with systemic lupus erythematosus being a frequent differential diagnosis.
- Elevated CPK, aldolase, and TGO, abnormal electromyography, and valuable muscle biopsy findings aided diagnosis.
- Prednisone treatment yielded good results in most patients.
Conclusions:
- Childhood dermatomyositis presents with diverse and often atypical cutaneous and muscular symptoms.
- Accurate diagnosis requires a combination of clinical evaluation and specific laboratory and electrophysiological tests.
- Prompt diagnosis and treatment with corticosteroids are crucial for favorable outcomes.
Abstract:
The study included 19 children with dermatomyositis. All showed frequently atypical cutaneous disords which in most cases were the initial manifestation. In every case there was some clinical evidence of proximal myopathy. Arthralgias were frequently found and sinusal tachycardia was present in 10 cases. The correct diagnosis was made from the beginning only in 6 cases. Systemic lupus erythematosus was the main cause of confusion. The differential diagnosis between these two entities cannot be made only by the presence or not of nephropathy, even if this disease was evident in 42% of patients with dermatomyositis. The most useful laboratory tests for the diagnosis and management were CPK, aldose and serum TGO. Electromyography was abnormal in every case where it was practiced. Muscular biopsy was valuable in 15 of the 19 patients. All were treated with prednisone and in most cases with good results.