Recently the percutaneous aspiration and instillation with 95% ethanol, for the sclerosing therapy of the renal simple cyst, was widely used because of high recurrence rate in simple needle aspiration. Ten patients were instillated with ethanol
after
aspiration. Ages of patients were between 37 to 77 years old. Chief complaints were flank pain, gross hematuria, indigestion, cpigastric discomfort and hypertension. After local anesthesia, the cysts were punctured with a trocar needle and
inserted
8.3
Fr. single J-catheter with guide wire in turn, under ultrasonic guidance. After completer aspiration of the fluid, 95% ethanol was instillated as much as 20-30% of the cystic volume, and kept for 20-30 minutes. The pigtail catheter was removed
after one
day. The aspirated vlume was 166 ml in average and nearly identical to transudate. There was no bacteria or malignant cells. Follow-up period was 7±2 months in average. five cases were completely cured, four cases recurred but the cyst was
smaller
(<50% of the original size) and one recurred as its original size. The complications were transient flank pain and facial flushing. In conclusion, aspiration and instillation with ethanol was very easy, safe, fast and effective treatment for the
simple
renal cyst.
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