RT Book, Section A1 Bayne, David B. A1 Thüroff, Joachim W. A1 Gillitzer, Rolf A1 Chi, Thomas A2 McAninch, Jack W. A2 Lue, Tom F. SR Print(0) ID 1171178539 T1 Percutaneous Endourology and Ureterorenoscopy T2 Smith & Tanagho's General Urology, 19e YR 2020 FD 2020 PB McGraw Hill PP New York, NY SN 9781259834332 LK accessmedicine.mhmedical.com/content.aspx?aid=1171178539 RD 2024/04/19 AB Endoscopic procedures in the kidney rely on two primary approaches: retrograde and antegrade instrumentation of the upper urinary tract. The retrograde approach utilizes ureterorenoscopy to traverse the urethra and ureter, while antegrade instrumentation requires a percutaneous puncture directly into the kidney. Both approaches must respect the intrarenal anatomy just as in open renal surgery, and imaging is required for safety.