JRA is an abbreviation of 'juvenile rheumatoid arthritis'.



There are many different types of childhood arthritis, and the causes tend to be obscure but this form involves multiple joints and the patient tests +ve for 'rheumatoid factor'.


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Polyarticular juvenile idiopathic arthritis – epidemiology and management approaches. Oberle EJ, Harris JG and Verbsky JW. Clin Epidemiol. 2014; 6: 379–393.

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