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Significance of a positive antinuclear antibody test in a pediatric population
Insights
A positive antinuclear antibody (ANA) test in children often indicates autoimmune or rheumatic diseases like lupus or juvenile arthritis. Further clinical evaluation is recommended for pediatric patients with repeated positive ANA results.
Area of Science:
- Pediatric Rheumatology
- Immunology
- Autoimmune Diseases
Background:
- A positive antinuclear antibody (ANA) test is a key indicator in diagnosing autoimmune conditions.
- Understanding the prevalence and significance of positive ANA tests in pediatric populations is crucial for early diagnosis and management.
Purpose of the Study:
- To review clinical and laboratory findings in children with positive ANA tests over a ten-year period.
- To determine the association between positive ANA tests and specific autoimmune/rheumatic diseases in children.
- To assess the diagnostic implications of positive ANA tests in pediatric patients.
Main Methods:
- Retrospective review of clinical and laboratory data.
- Analysis of 138 pediatric patients with positive antinuclear antibody (ANA) tests.
- Categorization of patients based on diagnosed diseases, symptoms, and other conditions.
Main Results:
- Two-thirds of patients (91/138) were diagnosed with specific autoimmune or rheumatic diseases, including systemic lupus erythematosus (37), juvenile rheumatoid arthritis (33), and Sjögren's syndrome (9).
- An additional 27 patients presented with autoimmune disease symptoms but did not meet criteria for specific disorders.
- Positive ANA tests were also observed in children with IgA deficiency (9), viral infections (10), and one case of leukemia.
Conclusions:
- Most children with a positive ANA test have identifiable autoimmune or rheumatic diseases.
- Pediatric patients with repeatedly positive ANA tests warrant thorough clinical and laboratory investigation for autoimmune or rheumatic conditions.
- Early and comprehensive evaluation is essential for children with positive ANA findings to ensure timely diagnosis and treatment.
Abstract:
Clinical and laboratory findings in 138 children seen during a ten-year period with a positive antinuclear antibody (ANA) test were reviewed. Two thirds (91 of 138) of the patients had specific autoimmune or rheumatic diseases, including systemic lupus erythematosus (n = 37), juvenile rheumatoid arthritis (n = 33), Sjögren's syndrome (n = 9), mixed connective tissue disease (n = 7), dermatomyositis (n = 3), and discoid lupus (n = 2). Another 27 patients had symptoms of autoimmune disease but did not fit criteria for specific disorders. Nine patients with IgA deficiency had a positive ANA test but did not have symptomatic autoimmune disease. Ten children had a positive ANA test in association with infections, mainly viral, and one had leukemia. Because most children with a positive ANA test had readily diagnosable autoimmune disorders, pediatric patients with a positive ANA on repeated testing should undergo clinical and laboratory studies for autoimmune or rheumatic disease.