Arthritis with or preceding daily fever with a duration of at least two weeks accompanied by at least one of the following symptoms during the first six months. |
– Erythematous rash; – Lymphadenopathy; – Hepatomegaly and/or splenomegaly; – Serositis. |
Exclusion criteria |
– Psoriasis or history of psoriasis in the patient or first degree relative; – Arthritis in a boy (six year-old or more) positive for HLA-B27; – Ankylosing spondylitis, enthesitis with arthritis, sacroiliitis and inflammatory bowel disease, Reiter syndrome or acute anterior uveitis in a first degree relative; – Presence of rheumatoid factor type IgM confirmed in an interval of at least three months apart. |