Re: Saravakos et al.: Cystinuria: Current diagnosis and management (Urology 2013;83:693-699)

摘要

We read with interest the article in press of 18 November, 2013, published in Urology, entitled Cystinuria: Current Diagnosis and Management. The authors considered as diagnostic evaluation of cystinuria, in the absence of a urinary stone, the urine cystine excretion exceeding 1300 mumol/g creatinine. They affirm that this value corresponds to 150 mmol/mmol creatinine. We believe probably that there is a mistake in the conversion because 1300 jlmol/g creatinine corresponds to 150 mumol/mmol creatinine. Moreover, there is the same mistake for the urine sum of COLA (cystine, ornithine, lysine, and arginine) : 5900 |imol/g creatinine corresponds to 670 mumol/mmol creatinine and not to 670 mmol/mmol creatinine, as the authors indicate.