From July 1987 to May 1990, a total of 13 simultaneous bilateral percutaneous nephrolithotripsies (PCNL) were performed in two medical institutions for bilateral proximal ureteral stones, bilateral pelvolithiasis and nephrolithiasis, and bilateral staghorn calculi. No major complications occurred. It appears that simultaneous bilateral PCNL has several advantages including reasonable operative time, safety of the procedure and cost effectiveness. Greater applications of this procedures is encouraged. (Author)

Human ; Male ; Female ; Middle Aged ; Adult ; Urinary Calculi ; Nephrolithiasis ; Staghorn Calculi