Matthew Bultitude and Kay Thomas are at the Stone Unit, Guy's and St Thomas' NHS Foundation Trust, 1st Floor Southwark Wing, Guy's Hospital, Great Maze Pond, London SE1 9RT, UK.
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Cystine capacity is an assay for assessing urinary cystine saturation and risk of a stone episode in patients with cystinuria. Lowering the threshold for this test improves its sensitivity, potentially enabling relaxation of follow-up regimens for patients at lowest risk of stone episodes and dose modification of medications for those at highest risk.Refers to Friedlander, J. I. et al. Do urinary cystine parameters predict clinical stone activity? J. Urol.http://dx.doi.org/10.1016/j.juro.2017.09.034 (2017)