What is juvenile idiopathic arthritis (JIA)?

Updated: Feb 07, 2020
  • Author: Howard R Smith, MD; Chief Editor: Herbert S Diamond, MD  more...
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Juvenile idiopathic arthritis (JIA), sometimes referred to as juvenile rheumatoid arthritis (JRA), is the most common form of childhood arthritis. In most patients, the immunogenic associations, clinical pattern, and functional outcome of JIA are different from those of adult-onset RA.

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