Table 5.

Enthesitis-related arthritis according to the International League of Associations for Rheumatology classification criteria2.

Definition: arthritis and enthesitis, or arthritis, or enthesitis, with at least 2 of the following:

  1. The presence of or a history of sacroiliac joint tenderness and/or inflammatory lumbosacral pain.

  2. The presence of HLA-B27 antigen.

  3. Onset of arthritis in a male over 6 years of age.

  4. Acute (symptomatic) anterior uveitis.

  5. History of ankylosing spondylitis, enthesitis-related arthritis, sacroiliitis with inflammatory bowel disease, Reiter’s syndrome, or acute anterior uveitis in a first-degree relative.

Exclusions:

  • Psoriasis or a history of psoriasis in the patient or first-degree relative.

  • The presence of IgM rheumatoid factor on at least 2 occasions at least 3 months apart.

  • The presence of systemic JIA in the patient.

  • JIA: juvenile idiopathic arthritis.