Juvenile idiopathic arthritis was formerly known as juvenile rheumatoid arthritis or juvenile chronic arthritis.
It presents as chronic joint swelling, pain with functional limitation for at least 6 weeks of unknown cause that starts before 16 year of age.
It is the most common autoimmune-autoinflammatory disease in children.
Around half of the children with juvenile idiopathic arthritis may have active disease until adulthood.


  • Formerly known as juvenile rheumatoid arthritis or juvenile chronic arthritis
  • Presents w/ arthritis of unknown cause that starts before age of 16 years & persists for at least 6 weeks after ruling out other diseases
  • Most common autoimmune-autoinflammatory disease in children
  • Differs from rheumatoid arthritis of the adults in terms of age at presentation, propensity to cause joint contractures & muscle wasting, & association w/ extraarticular manifestation
  • Around 50% of children w/ juvenile idiopathic arthritis (JIA) may have active disease until adulthood


  • Arthritis is a condition where there is joint effusion & has decreased range of motion, pain on movement &/or warmth on the joint
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