A Case of Uric Acid Renal Stone with Hypouricemia Caused by Tubular Reabsorptive Defect of Uric Acid

Abstract
A 60 yr old man had a uric acid [UA] stone in the kidney and laboratory findings of hypouricemia (1.1 mg%) and increased UA clearance [C] (43 ml/min per 1.73 m2). CUA exceeded the endogenous creatinine C after administration of pyrazinamide, an inhibitor of renal tubular secretion of UA. The patient had a complete defective mechanism for UA reabsorption, resulting in hyperuricuria and the formation of the UA stone.

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