Purpose. We aimed to compare and evaluate the outcomes and complications of two endoscopic treatment procedures, semirigid\nureteroscopy (SR-URS) and flexible ureteroscopy (F-URS), in the treatment of proximal ureteral stones (PUS). Methods. SR-URS\n(group 1) was done on 68 patients whereas 64 patients underwent F-URS (group 2) for the treatment of PUS. Success rate was\ndefined as the absence of stone fragments or presence of asymptomatic insignificant residual fragments < 2 mm. Outcomes and\ncomplications were recorded. Results.The differences were statistically not significant in age, gender, body mass index (BMI), and\nstone characteristics between groups.Mean ureteral stone size was 9.1 �± 0.4mm and 8.9 �± 0.5mm for groups 1 and 2.Mean operative\ntime was 34.1 �± 1.5 min and 49.4 �± 2.3 min for groups 1 and 2 (
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