ANAHEIM, CA (UroToday.com) - Dr. Shah from the Ohio State University described their three-year experience on 75 patients who underwent radiofrequency ablation for a total of 93 renal tumors. Average patient age was 64.5 years with ASA of 2.9. Indications for nephron-sparing were imperative in 33 (solitary kidney 21, renal insufficiency 12). Seventeen patients were poor risk for surgery. RFA was performed via a transperitoneal approach using pronged 3cm Cool tip electrode. The lesions were biopsied prior to the ablation. During ablation, temperature and impedance monitoring were performed. The center and the periphery of the tumor were monitored for temperature up to 70oC. Patients were followed at 3-month intervals with triple phase CT scan or MRI. Growth and enhancement were considered criteria for recurrent tumor. All procedures were successful without open conversion. Average operative time was 109 mins. and average blood loss was <25cc. Mean hospital stay was 1.4days. At average follow up of 19.2 months, one lesion showed evidence of tumor recurrence which was surgically removed. Two masses with mild enhancement were biopsied but showed only fibrosis. Of the patients with follow up of greater than 12 months, 75% had decreasing size of lesion, 25% had no change in size. No complications were seen. The authors should be commended for this large volume of work on renal radiofrequency ablation. This has shown that RFA of renal tumors is a feasible alternative for patients who have an imperative indication for nephron-sparing surgery or those that have significant co-morbidities. This is important for patients who are not suitable candidates for laparoscopic partial nephrectomy.

Authors: Ketul K Shah*, Rahul K Thaly, Vipul R Patel. Columbus OH.

Abstract 1303

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