Fig. 2From: One-stage efficacy of single tract minimally invasive ECIRS in the improved prone frog split-leg position for staghorn stonesSingle tract minimally invasive endoscopic combined intrarenal surgery (stmECIRS) in the improved prone frog split-leg position for staghorn stones. One urologist performed the anterograde single tract minimally invasive percutaneous nephroscopy (stmPNL), another one performed the retrograde flexible ureteroscope (FURS)Back to article page