Yanaral F, et al. – This study was designed with goal to evaluate and compare the accuracy of S.T.O.N.E, Clinical Research Office of the Endourological Society (CROES), and Guy’s stone score in patients with chronic kidney disease (CKD) following percutaneous nephrolithotomy (PNL). As per findings, the only independent factor in the prediction of PNL outcome in these patients was CROES scoring system (SS). For predicting PNL complications in patients with CKD, three of the NSSs were not useful.