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Juvenile rheumatoid arthritis--Madras experience
A N Chandrasekaran1, C P Rajendran, R Madhavan
1Department of Rheumatology Madras Medical College and Govt. General Hospital.
Indian Journal of Pediatrics
|July 1, 1996
Summary
This study classified 331 children diagnosed with Juvenile Rheumatoid Arthritis into systemic, polyarticular, and oligoarticular onset types. Findings detail clinical features and diagnostic markers for each subtype, aiding in better juvenile arthritis management.
Area of Science:
- Pediatrics
- Rheumatology
- Clinical Immunology
Background:
- Juvenile Rheumatoid Arthritis (JRA) is a significant pediatric rheumatologic condition.
- Accurate classification of JRA onset types is crucial for effective management and prognosis.
- Previous diagnostic criteria required refinement for better characterization of JRA subtypes.
Purpose of the Study:
- To classify children diagnosed with Juvenile Rheumatoid Arthritis based on onset type.
- To delineate the clinical and laboratory features of systemic, polyarticular, and oligoarticular JRA subtypes.
- To provide data that can aid in the diagnosis and management of pediatric rheumatic diseases.
Main Methods:
- A prospective study of 1,053 children attending a Rheumatic Care Centre.
- Diagnosis of JRA based on American Rheumatism Association criteria, modified by Cassidy et al.
- Classification into systemic, polyarticular, and oligoarticular onset types, with further sub-classification.
- Exclusion of other arthritic conditions through thorough examination and investigation.
Main Results:
- 331 children met the JRA criteria.
- Systemic onset (44 cases): fever, lymphadenopathy, rash, and joint involvement (wrists, knees) were common; ANA positivity and anemia were noted.
- Polyarticular onset (171 cases): frequent involvement of wrists, knees, hips, and ankles; ANA positivity varied between RF+ and RF- subtypes.
- Oligoarticular onset (116 cases): Subtype-1 showed universal ANA positivity without iridocyclitis. Subtype-2 had high HLA B27 and sacroiliitis rates. Subtype-3 was HLA B27 negative.
Conclusions:
- The study successfully classified JRA cases into distinct onset types, highlighting characteristic clinical and laboratory findings for each.
- Understanding these subtypes, including associated markers like ANA and HLA B27, can improve diagnostic accuracy in pediatric rheumatology.
- This classification provides a foundation for targeted therapeutic strategies and prognostic assessments in children with JRA.