15 maggio 1. RIRS OF A BIG STONE WITH CLEAR PETRA ACCESS SHEET 2. RIRS DI CALCOLI ENDOPRENCHIMALI 3. PEAS REMOVAL FROM BRONCHIAL TREE USING AN URETERAL STONE BASKET 4. UROLITHIASIS IN BRICKER: A CASE REPORT 5. RETROGRADE INTRARENAL SURGERY VS MINIATURIZED PERCUTANEOUS NEPHROLITHOTOMY TO TREAT RENAL STONES FROM 1.5 CM TO 2 CM IN DIAMETER