How is juvenile idiopathic arthritis (JIA) diagnosed?

Updated: Jul 25, 2019
  • Author: David D Sherry, MD; Chief Editor: Lawrence K Jung, MD  more...
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JIA is a clinical diagnosis. A complete physical examination is critical for the diagnosis. Physical findings are important to provide criteria for diagnosis and to detect abnormalities suggestive of alternative etiologies. The diagnosis of JIA is based on the physical finding of arthritis in at least 1 joint that has persisted for at least 6 weeks, with other causes excluded, in an individual younger than 16 years.

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