Authors: Olivier Rouvière Lionel Badet François Joseph Murat Jean Marie Maréchal Marc Colombel Xavier Martin Denis Lyonnet Albert Gelet
Publish Date: 2008/02/05
Volume: 31, Issue: 3, Pages: 595-603
Abstract
The objective of this study was to retrospectively evaluate the results of radiofrequency ablation RFA of renal tumors with an impedancebased system using an expandable multitined electrode Twentytwo patients 30 tumors were treated with RFA over a 7year period percutaneously 16 tumors or intraoperatively 14 tumors Followup imaging was performed at 1–3 6 and 12 months and yearly thereafter Twentyseven of 30 tumors 19/22 patients showed no residual tumor on the first imaging control Two residual tumors were successfully ablated by a second RFA procedure Our mean followup period was 35 months range 3–84 months Two tumors that had been completely ablated based on imaging criteria recurred 11 and 48 months after RFA One was treated by partial nephrectomy The other one was not treated because the patient developed bone metastases One patient had nephrectomy because of an RFAinduced ureteropelvic junction stricture Nine patients 11 sessions had a pyeloperfusion of cooled saline during RFA None developed symptomatic complications even though in three patients the ablation zone extended to the closest calyx 3–5 mm from the tumor We conclude that RFA of renal tumors is promising but serious complications to the collecting system must be taken into consideration Prophylactic perprocedural cooling of the collecting system is feasible but needs further assessment
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