Safe surgical treatment of peripelvic renal cyst combined with renal calculi by percutaneous nephroscopy.

We have tried to establish a safe and effective method to treat the peripelvic renal cyst combined with renal calculi. The key points are as follows: choose the appropriate target calyx; find the gap between cyst and renal pelvic; put a nephrostomy tube to stimulate the closing of cystic cavity.