Purpose
The goal of this retrospective study was to evaluate the feasibility, safety, and outcomes of using radiofrequency ablation (RFA) of primary renal tumors as a means of controlling local disease while preserving renal parenchyma in a series of patients with metastatic renal cell carcinoma (RCC) in a single-institutional, multidisciplinary setting.
Materials and Methods
We evaluated the records of patients with metastatic RCC who had undergone percutaneous RFA of a primary renal tumor. Patients’ demographic and disease characteristics, adjunctive medical and surgical therapies, recurrence, and clinical outcomes were studied.
Results
Fifteen patients treated between 2002 and 2008 met the inclusion criteria. There was no incomplete ablation or local recurrence. Ten patients had a biopsy-proven RCC in the ablated renal mass. Eight patients had a solitary metastasis, 3 patients had 2-site metastases, and 4 patients had 3 or more metastatic sites. Four patients experienced major complications. Median radiographic and clinical followup of patients at risk for an event was 25.5 and 33.0 months, respectively. Overall survival rates at 1, 3, and 5 years after RFA were 73.3%, 57.1%, and 38.1%, respectively. At last evaluation, 4 were alive and in complete remission, 4 were alive with no evidence of local recurrence but with evidence of distant disease, and 7 had died of their disease.
Conclusions
RFA is feasible and safe in highly selected patients with metastatic RCC, resulting in durable local control as part of multimodality management, and achieving renal preservation. Further investigation is required to define the role of RFA in this patient population.