Percutaneous aspiration followed by instillation with 95% ethanol was performed on 15 patients with benign renal cyst. 86.6% of patients showed remarkable reduction in size of renal cyst or abscence of cyst on sonography. Nine(81.8%) of the 11 symptomatic patient were relieved of subjective symptoms such as flank pain after instillation. There was no major complication with this procedure. A slight local irritable pain was noticed in 2 cases and 1 patient had not flush but three symptom were only temporary. This treatment seems to be a safe and simple and effective way to prevent recurrence of the cyst.
Ethanol* ; Flank Pain ; Humans ; Recurrence