Percutaneous RF thermal ablation of renal tumors: is US guidance really less favorable than other imaging guidance techniques?

Cardiovascular and Interventional Radiology
Andrea VeltriCesare Fava

Abstract

The purpose of this study was to compare our experience with ultrasound (US)-guided percutaneous radiofrequency thermal ablation (RFA) of renal tumors with results of CT-guided and MRI-guided series in the current literature. Of 90 consecutive renal tumors treated with RFA in 71 patients, 87 lesions were ablated under US guidance. We performed a retrospective analysis of clinical outcome and safety. Results were then compared to published case series where CT and MRI guidances were used exclusively. In our series we had a major complication rate of 4.6%, whereas in CT- and MRI-based series it was 0-12% (mean, 2.2%) and 0-8.3% (mean, 4.1%), respectively. During follow-up (1-68 months; mean, 24 months) technical effectiveness was 89.7%, while it was between 89.5% and 96% in CT-guided series and between 91.7% and 100% in MRI-guided series. The size of successfully treated lesions (28 mm) was lower than that of partially-ablated lesions (36 mm; p = 0.004) and only central lesion location proved to be a negative prognostic factor (p = 0.009); in CT-guided series, positive prognostic factors were exophytic growth and size </=3 cm. "Tumor-specific" 2-year survival was 92% in our series, 90-96% in CT-guided series, and not reported in ...Continue Reading

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Citations

May 19, 2010·Journal of Endourology·Steven JoniauAdrian Joyce
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