Radiofrequency Ablation of Renal Tumors with an Expandable Multitined Electrode: Results, Complications, and Pilot Evaluation of Cooled Pyeloperfusion for Collecting System Protection

Journal Article · Thu May 15 00:00:00 EDT 2008 · Cardiovascular and Interventional Radiology

DOI:https://doi.org/10.1007/S00270-007-9291-3· OSTI ID:21094146

Rouviere, Olivier ^[1]; Badet, Lionel; Murat, Francois Joseph; Marechal, Jean Marie; Colombel, Marc; Martin, Xavier ^[2]; Lyonnet, Denis ^[1]; Gelet, Albert ^[2]

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1. Edouard Herriot Hospital, Department of Genitourinary and Vascular Imaging, Hospices Civils de Lyon (France)
2. Edouard Herriot Hospital, Department of Urology, Hospices Civils de Lyon (France)

The objective of this study was to retrospectively evaluate the results of radiofrequency ablation (RFA) of renal tumors with an impedance-based system using an expandable multitined electrode. Twenty-two patients (30 tumors) were treated with RFA over a 7-year period, percutaneously (16 tumors) or intraoperatively (14 tumors). Follow-up imaging was performed at 1-3, 6, and 12 months and yearly thereafter. Twenty-seven 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 follow-up 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 RFA-induced 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 per-procedural cooling of the collecting system is feasible but needs further assessment.

• OSTI ID: 21094146
• Journal Information: Cardiovascular and Interventional Radiology, Vol. 31, Issue 3; Other Information: DOI: 10.1007/s00270-007-9291-3; Copyright (c) 2008 Springer Science+Business Media, LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0174-1551
• Country of Publication: United States
• Language: English

Related Subjects

62 RADIOLOGY AND NUCLEAR MEDICINE
ABLATION
ELECTRODES
KIDNEYS
METASTASES
NEOPLASMS
NEPHRECTOMY
PATIENTS
RADIOWAVE RADIATION
SKELETON