Juvenile idiopathic arthritis is a diagnosis of exclusion

Results 11 patients were directed with systemic JIA and 2 with olygoarthritis. All patients with “JIA” had criteria for diagnosis according ILAR classification. All patients with ‘’systemic JIA’’ had fever, hepatosplenomegaly, generalized lymphadenopathy, arthralgia or arthritis, high level of CRP, ESR, anemia. Patients with ‘’óligoarthritis’’ had monoarthritis. The diagnosis was made at the place of residence. 6 patients received immunodepressants (methotrexate, cyclosporine), 8 patients – glucocoticoids, 1 – tocilizumab. Disease duration was from 2 to 9 months, the duration of hospitalization until the diagnosis was verified was from 1 to 7 days. We performed ultrasound, radiography, CT scan, MRI, bone marrow punction, biopsy of lymph node, biopsy of bone. There were 4 patients with neuroblastoma, 2 with lymphogranulomatosis, 4 with leukemia, 1with malignant lymphoma from patients with “sJIA”. There was 1 patient with malignant histiocytoma and 1 patient with glyoma from patients with “oligoarthritis”. Concomitant treatment made difficult to verify right diagnosis.