[Percutaneous nephroscopic 2 µm laser incision and drainage treatment of peripelvic renal cysts]

To explore the surgical approaches, efficacy and safety of percutaneous nephroscopic 2 µm laser incision and drainage in the treatment of peripelvic renal cysts.

The peripelvic renal cysts were punctured percutaneously. A 1.5 - 4.0 cm incision was made at thin avascular area between cyst and pelvis by the 2 µm laser to connect the cyst with the renal collecting system with the help of injecting methylene blue solution into renal pelvis through ureteral catheter. The double-J tube was placed for drainage.

The operations were successful in all cases. There were 16 males and 15 females with a mean age of 49 years old. The operative durations ranged from 25 to 120 minutes. And no severe complications occurred. The patients were followed up for an average of 12 months (range: 3 - 36). Among them, cysts disappeared in 18 cases and diminished over 1/3 in 13 cases. There was no recurrence of peripelvic renal cyst.

Percutaneous nephroscopic 2 µm laser incision and drainage for peripelvic renal cyst is safe, effective and mini-invasive.