MP54-09 MANAGEMENT OF SMALL RENAL MASSES USING CONTRAST-ENHANCED ULTRA SOUND PERCUTANEOUS RADIOFREQUENCY ABLATION: FUNCTIONAL RESULTS, EARLY ONCOLOGICAL OUTCOMES AND COMPLICATIONS ACCORDING THE R.E.N.A.L NEPHROMETRY SCORE

Abstract

underwent PN, in 33.3% of which a MIT was adopted. Majority of RNs for T1 tumours were performed using a MIT (90.3%). Of the laparoscopic PNs, 30.5% were robot-assisted. No significant difference in intra operative complications was found between the RN and PN groups (4% vs 4.3% respectively; p1⁄40.79). However PN accounted for a higher postoperative complications rate (RN 11.3% vs PN 17.6%; p1⁄40.0002). Operative time between RN and PN was comparable (141min vs 145min; p1⁄40.25). Blood loss was less in the RN group (mean for RN 165mL vs PN 323mL; p<0.0001), however, transfusion rates were similar (3.2% vs 2.6% respectively; p1⁄40.47). RN was associated with a shorter length of stay (median 4 days vs 5 days; p1⁄40.0004). Comparison between robot-assisted and laparoscopic PN showed no significant differences in operation time, blood loss, warm-ischaemia time or complications. CONCLUSIONS: PN was the modality of choice for treatment of T1a tumours whereas RN was preferred for T1b tumours. MIT have been widely adopted for RN but not for PN. The age and WHO performance status would have influenced decision making. Despite the advances in surgical technique, a substantial risk of postoperative complications remains with PN.