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Mixed connective tissue disease in childhood
1Department of Pediatrics, Yokohama City University School of Medicine, Japan.
Acta Paediatrica Japonica : Overseas Edition
|October 1, 1993
Summary
This study analyzes 21 Japanese children with mixed connective tissue disease (MCTD), highlighting early Raynaud's phenomenon and anti-ribonuclear protein (RNP) antibodies. While generally good, severe cardiac or kidney issues can arise, necessitating further research.
Area of Science:
- Pediatric Rheumatology
- Immunology
Background:
- Mixed Connective Tissue Disease (MCTD) in childhood is a rare autoimmune disorder.
- Understanding its clinical spectrum and serological markers is crucial for diagnosis and management.
Purpose of the Study:
- To analyze the clinical features and laboratory findings of 21 children diagnosed with MCTD in Japan.
- To characterize the typical presentation, serology, and prognosis of childhood MCTD.
Main Methods:
- Retrospective analysis of 21 pediatric MCTD cases reported in Japanese literature since 1981.
- Evaluation based on established criteria from the Ministry of Health and Welfare, Japan.
- Review of clinical symptoms, laboratory findings, and serological markers, including anti-ribonuclear protein (RNP) antibody.
Main Results:
- Childhood MCTD often presents with Raynaud's phenomenon, preceded by fever, arthralgia, myalgia, or scleroderma-like skin changes.
- All patients were positive for anti-ribonuclear protein (RNP) antibody and speckled antinuclear antibody.
- Characteristic findings include hypergammaglobulinemia, positive rheumatoid factor, and normocomplementemia.
Conclusions:
- Childhood MCTD generally has a better prognosis than childhood systemic lupus erythematosus, though severe complications like myocarditis or nephrotic syndrome can occur.
- Long-term follow-up and improved anti-ribonucleoprotein antibody detection are needed for better characterization and treatment of pediatric MCTD.