“…Peers et al [14] reported on 18 endoscopic pyeloplasties performed on the pig: ureteral anastomosis was carried out in all cases using either clips or intracorporéal suturing, or a combination of intracorporéal suturing and fibrin glue tissue sealant. A clear disadvantage of the retroperitoneoscopic approach is the smaller operative field compared to the transperiMinimally invasive treatment of ureteropelvic junc tion obstruction was initially reported in 1983 [1,9], Per cutaneous or retrograde endopyelotomy provide the ad vantages of significantly reduced hospitalization and re covery while yielding success rates upwards of 80% [3,10]. However, while retrograde and antegrade endopye lotomy offer similar success rates, incision of the uretero pelvic junction with a ureteroscope is technically more difficult than using the percutaneous technique [4], Recently, Banerjee et al [2] reported on a comparative study between percutaneous endopyelotomy and open pyeloplasty, concluding that there were no significant dif ferences in terms of efficacy and overall morbidity, but only for what concerns hospital stay and cosmetic results.…”