How is undifferentiated 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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Undifferentiated JIA is diagnosed if the patient’s manifestations either do not fulfill the criteria for any one category or fulfill the criteria for more than one.

Most often, children in the latter category fulfill the criteria for polyarticular RF-negative JIA and either enthesitis-related JIA or psoriatic JIA. [21]

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