What are the signs and symptoms of oligoarticular juvenile idiopathic arthritis (JIA)?

Updated: Jul 25, 2019
  • Author: David D Sherry, MD; Chief Editor: Lawrence K Jung, MD  more...
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Characteristics of oligoarticular JIA include the following:

  • In individuals with oligoarticular JIA, 4 or fewer joints (and in many cases, only 1 joint) are affected

  • Large, weight-bearing joints, such as the knees and ankles, are typically affected, as seen in the image below

    Eighteen-month-old girl with arthritis in her righ Eighteen-month-old girl with arthritis in her right knee. Note the flexion contracture of that knee.
  • Children appear to be well, despite ambulating with a limp

  • In cases of asymmetrical arthritis, chronic inflammation-related hyperemia in a knee or ankle may lead to overgrowth of that limb with subsequent leg-length discrepancy

  • Muscle atrophy, often of extensor muscles (eg, vastus lateralis, quadriceps when the knee is affected), may occur

  • Flexion contractures in the knees and, less commonly, the wrists are found

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