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An 80-year-old man with a 30-year history of gout was referred to the rheumatology clinic for further treatment. He had received colchicine and urate-lowering drugs intermittently over the previous several years. Clinical examination revealed multiple tophi on the hands (Panel A), feet, knees, and auricular surfaces. Some of the tophi exuded a white, chalky material. Laboratory studies were notable for a serum uric acid level of 8.5 mg per deciliter (506 µmol per liter), urinary urate excretion of 350 mg per day (2 mmol per day), and a creatinine clearance rate of 39 ml per minute per 1.73 m2 of . . . [Full Text of this Article] |
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