In 4 cases of robot-assisted pyeloplasty for UPJO there was one with horseshoes kidney: mean age: 39.5 (range: 23 - 64), operative time: 157.5 minutes (range: 120 - 210), EBL: 60 mL (range: 10 - 200), postop hospital stay: 5.25 days (range: 3 - 7);