[Arthritis urica. Clinical picture, diagnosis and treatment].

Gout is an acute episodic monarthritis or chronic pauci- or polyarticular arthritis. The symptoms of gout are induced by monosodium-urate crystals that are liberated from accumulations in connective tissue structures, primarily cartilage. Deposition of monosodium-urate crystals is caused by hyperuricaemia, which is dealt with in a previous paper. Only a minority of persons with hyperuricaemia develop gout, however. The diagnosis is based on detection of urate crystals in synovial fluid or tophi. Acute gout is treated with antiinflammatory agents, primarily NSAIDs or colchicine. Predisposing diseases and associated conditions such as hypertension, diuretic drugs, overweight and nephropathy should be controlled as well as possible. In patients with recurrent attacks of acute gout or chronic gout, treatment with urate lowering drugs, principally allopurinol, should be given. Treatment with allopurinol should be adjusted according to levels of serum urate and renal function. Serious complications to allopurinol treatment have been described.