Which of the following is diagnostic for juvenile idiopathic ahritis (JIA)?
Juvenile Idiopathic ahritis (JIA) is a clinical diagnosis without any diagnostic laboory tests. The meticulous clinical exclusion of other diseases and many mimicking conditions is , therefore essential. Laboratory studies, including tests for ANA and RF, are only suppoive or prognostic, and their results may be normal in patients with JIA. Ref: Nelson textbook of pediatrics 21st edition Pgno: 1263
Anti-nuclear antibody
ESR
Rheumatoid factor
clinical diagnosis without any diagnostic laboory tests
Musculoskeletal  disorders