acute arthritis

acute rheumatic fever

juvenile idiopathic arthritis (oligoarthritis, polyarthritis, psoriatic arthritis, enthesitis related arthritis)

systemic vasculitis (Henoch Schonlein vasculitis, erythema nodosum, polyarteritis nodosa, Behcet’s disease)

connective tissue disorders (systemic lupus erythematosus, juvenile dermatomyositis, systemic and localized scleroderma)

chronic recurrent multifocal osteomyelitis