Phase II trial of radio frequency ablation of renal cancer: Evaluation of the kill zone

Brian R. Matlaga, Ronald J. Zagoria, Ralph D. Woodruff, Frank M. Torti, M. Craig Hall

Research output: Contribution to journalArticle

Abstract

Purpose: We report on the pathological evaluation of renal tumors after intraoperative radio frequency ablation performed immediately before surgical nephrectomy. Materials and Methods: Ten patients with renal tumors were enrolled in a prorpective, Institutional Review Board approved phase II trial of radio frequency ablation. Following surgical expostre of the kidney a single 12-minute radio frequency ablation of the tumor was performed using the Radionics Cool-tip RF Radio Frequency Ablation System (Radionics, Burlington, Massachusetts). The tumor was then excised via radical or partial nephrectomy. Gross and histological evaluations of the tumor were performed, including evaluation with nicotinamide adenine dinucleotide vital staining. Results: All 10 tumors were confirmed histologically to be renal cell carcinoma. Mean tumor size was 3.2 cm. (range 1.4 to 8.0). Of the 10 tumors 8 were completely ablated with a mean treatment margin of 6.75 mm. (range 2 to 13). Of the 2 tumors that were incompletely treated 1 never attained a temperature sufficient for tissue destruction and the other measured 8 cm., far exceeding the expected ablation volume of treatment protocol. Conclusions: This study represents the initial report of the hhstological outcome of saline cooled radio frequency ablation of renal tumors. Our data indicate that it can completely destroy renal cancers while transmitting minimal collateral damage to surrounding renal parenchyma. Further investigation is required to determine long-term oncological outcome.

Original languageEnglish (US)
Pages (from-to)2401-2405
Number of pages5
JournalJournal of Urology
Volume168
Issue number6
DOIs
StatePublished - Dec 1 2002
Externally publishedYes

Keywords

  • Carcinoma, renal cell
  • Hyperthermia, induced

ASJC Scopus subject areas

  • Urology

Fingerprint Dive into the research topics of 'Phase II trial of radio frequency ablation of renal cancer: Evaluation of the kill zone'. Together they form a unique fingerprint.

  • Cite this