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Korean J Nephrol. 2002 May;21(3):469-474. Korean. Case Report.
Shin DI , Tae HJ , Park YB , Park SH , Chae EY , Chang YS .
Department of Internal Medicine, Medical College, The Catholic University of Korea, Seoul, Korea.

Renal stone and nephrocalcinosis are common clinical manifestations of type 1 renal tubular acidosis. In normal state, citrate plays the most critical role in suppressing stone formation as it combines with calcium. In type 1 RTA, increased reabsorption of citrate in proximal tubule results in low citrate excretion, which precipitates renal stone formation. We report a case of type 1 RTA accompanying renal stone and nephrocalcinosis caused by hypocitraturia. A 16-year-old male patient who had renal stone and nephrocalcinosis showed hypocitraturia. Incomplete type 1 RTA was proved as the cause of hypocitraturia by bicarbonate and ammonium loading test in the patient.

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