Effect of Sclerotherapy after Percutaneous Aspiration of the Simple Renal Cyst / 대한비뇨기과학회지

ABSTRACT

PURPOSE: Recently, percutaneous aspiration with sclerotherapy has become widely used as a treatment of the symptomatic, large, and simple renal cysts, due to its minimal invasiveness and high effectiveness. However, the reported recurrence rates of simple aspiration are high, in the range 30 to 70%. Therefore, the effect of percutaneous aspiration with sclerotherapy of simple renal cysts was analyzed. MATERIALS AND METHODS: The results of the treatment in 35 simple renal cysts, between June 1994 and July 2003, were evaluated. The symptoms associated with simple renal cysts were; none (40%), flank pain (31.4%), indigestion (17.1%), hematuria (8.6%) and a palpable mass (2.9%). The simple renal cysts were treated with percutaneous aspiration in only 7 cases (group I), single percutaneous aspiration with sclerotherapy, using 99% ethanol, in 18 (group II) and a repeated percutaneous aspiration with sclerotherapy, using 99% ethanol, in 10 (group III). All patient were followed up by ultrasound or CT scan for 12 to 80 months (mean 28.1 months). RESULTS: Complete and partial collapses and recurrences of the renal cysts occurred in 1 (14.2%), 3 (42.9%) and 3 (42.9%) in group I, 7 (39%), 10 (55.5%) and 1 (5.5%) in group II, and 6 (60%), 3 (30%) and 1 (10%) in group III. The overall efficacies were 92% in all 3 groups. Furthermore, all recurrences occurred within the first year of the follow up period in all groups. CONCLUSIONS: For a simple renal cyst, percutaneous aspiration with sclerotherapy, using 99% ethanol, either singly or repeatedly, appears to be effective in the prevention of re-accumulation of cystic fluid; it also proved to have a positive long term result in terms of a relapse of a simple renal cyst.