What is the pathophysiology of juvenile idiopathic arthritis (JIA)?

Updated: Jul 25, 2019
  • Author: David D Sherry, MD; Chief Editor: Lawrence K Jung, MD  more...
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JIA is a genetically complex disorder in which multiple genes are important for disease onset and manifestations. The IL2RA/CD25 gene has been implicated as a JIA susceptibility locus, as has the VTCN1 gene. [7] Associations have been found between specific HLA alleles and clinical subtypes of JIA (eg, HLA-A(*)02:06 with susceptibility to JIA accompanied by uveitis, and HLA-DRB1(*)04:05 with polyarticular JIA, in a Japanese cohort). [8]

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