[Retroperitoneoscopic operations in cystic lesions of the kidneys].

In 1997-2002 retroperitoneoscopic dissection of renal cyst walls (RDRC) was made in 21 patients. Computed tomography, excretory urography, retrograde ureteropyelography were conducted in 14, 3 and 2 patients, respectively. Ultrasonic investigation was made in all the patients before and after operation. Dissection of the cystic walls was successful in 20 of 21 patients, material for cytological and histological examinations was also obtained. Advantages of endoscopic operations are now obvious, so RDRS is perspective in cystic lesions of the kidneys and its usage will increase.