Objective:To investigate the clinical value of S.T.O.N.E.nephrolithometry scoring system in predicting stone-free rate and complications in PCNL.Method:A retrospective analysis of clinical data of 1 791 consecutive patients with nephrolithiasis who underwent PCNL was done.We analyzed the correlation between S.T.O.N.E.score and stone-free rate,blood loss,operative time,length of hospital stay and complications.Result:The S.T.O.N.E.nephrolithometry score was(7.27 ± 1.27).Mean S.T.O.N.E.score of patients who h...