“…In addition, factors such as positive preoperative urine culture, female gender, duration of operation, nephrostomy tube use, diabetes mellitus, chiropractic, type of stone, and history of PCNL surgery may increase the risk of fever [ [5] , [6] , [7] , [8] ]. However, studies not only have shown that diabetes mellitus patients are at higher risk of developing postoperative fever, but also have shown significant differences between the number of diabetes mellitus patients with and without postoperative fever [ 3 , 9 ]. It seems that another risk factor of postoperative fever after PCNL might be hydronephrosis, but there is controversial information about its effects on postoperative fever in patients who had undergone PCNL.…”