PReS-FINAL-2087: Diagnosis of arthritis: history or laboratory?

Results Median age was 10 years (range 1-17). Diagnoses of the patients were Juvenile Idiopathic Arthritis (JIA) (35.7), reactive arthritis (15%), Familial Mediterranean Fever (FMF) (12.7%), connective tissue disorder/vasculitis (11.5%) and septic arthritis (3.8%). The remaining of patients (15.9%) was classified as arthritis of unknown etiology. Of all patients 51% had monoarticular, 38% had oligoarticular and 11% had polyarticular involvement. 41% of JIA patients had monoarthritis, 42% of them had oligoarthritis. Polyarthritis was detected in 16% of JIA cases. 75% of FMF patients had monoarticular arthritis. Sacroiliac tenderness was detected in 33 patients (25.2%). Seventeen of these patients were diagnosed as JIA. Uveitis was defined in 9% of patients. Diagnoses of patients with uveitis were JIA (71%) and connective tissue disorder/vasculitis (29%). Ophthalmological examination was normal in other disease groups (p < 0.05). Patients with uveitis had mostly monoarticular arthritis (50%). HLA B27 was positive in 6 patients (4%). Sacroileitis was determined in 66% of those patients. ANA was positive in 25% of patients and only 43.9% of patients with JIA had positive test for ANA. There was no significant difference in levels of acute phase reactants in different disease groups.