Published January 1, 2016
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An Unusual Type of Kidney Stone
Description
A very rare case of acetylsulfapyridine nephrolithiasis is presented in a 54-year-old female patient who had been prescribed sulfasalazine (6 x 500 mg/day) because of psoriatic arthritis for the last 9 years. The patient's renal function was only slightly impaired. Reflectance infrared spectroscopy and gas chromatography-mass spectrometry allowed the identification of the chemical nature of the stone. As acetyl sulfapyridine is a metabolite of sulfasalazine, administration of the latter drug was the cause of nephrolithiasis.
(Clin. Lab. 2016;62:235-239. DOl: 1 0.7754/Clin.Lab.20l5.150605)
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