Predictive factors for complete XXXX ablation using RFA.

@entity1 @entity1637 @entity5 @entity1358 @entity703
BACKGROUND: Radiofrequency ablation (RFA) can be used to treat renal masses in @entity1 where surgery is preferably avoided. As @entity5 size and location can affect ablation results, procedural planning needs to identify these factors to limit treatment to a single session and increase ablation success. PURPOSE: To identify factors that may affect the primary efficacy of complete @entity703 ablation with radiofrequency after a single session. MATERIAL AND METHODS: Percutaneous RFA (using an impedance based system) was performed using computed tomography (CT) guidance. Fifty-two @entity703 (in 44 @entity1 ) were retrospectively studied (median follow-up, 7 months). Data collection included @entity1 demographics, @entity5 data (modified Renal Nephrometry Score, histopathological diagnosis), RFA treatment data (electrode placement), and follow-up results ( @entity5 relapse). Data were analyzed through generalized estimating equations. RESULTS: Primary efficacy rate was 83%. Predictors for complete ablation were optimal electrode placement (P   =   0.002, OR   =   16.67) and increasing distance to the collecting system (P   =   0.02, OR   =   1.18). @entity5 size was not a predictor for complete ablation (median size, 24   mm; P   =   0.069, OR   =   0.47), but all @entity5  <=2   cm were completely ablated. All @entity5 and @entity1637 were completely ablated in a single session; the most common incompletely ablated @entity5 type was @entity1358 (6 of 9). CONCLUSION: Optimal electrode placement and a long distance from the collecting system are associated with an increased primary efficacy of @entity703 RFA. These variables need to be considered to increase primary ablation success. Further studies are needed to evaluate the effect of RFA on histopathologically different @entity703 .
