You have accessJournal of UrologyKidney Cancer: Localized: Surgical Therapy II (PD16)1 Sep 2021PD16-05 PERC-SCORE: A NEPHROMETRY SCORE FOR PERCUTANEOUS TUMOR ABLATION OF SMALL RENAL MASS Lorenzo Bianchi, Pietro Piazza, Francesco Chessa, Angelo Mottaran, Carlo Casablanca, Matteo Droghetti, Carlo Roveroni, Francesco Costa, Marco Salvador, Stefano Puliatti, Caterina Gaudiano, Alberta Cappelli, Alessandro Bertaccini, Emanuela Marcelli, Angelo Porreca, Bernardino De Concilio, Rita Golfieri, Carla Serra, Antonio Celia, Riccardo Schiavina, and Eugenio Brunocilla Lorenzo BianchiLorenzo Bianchi More articles by this author , Pietro PiazzaPietro Piazza More articles by this author , Francesco ChessaFrancesco Chessa More articles by this author , Angelo MottaranAngelo Mottaran More articles by this author , Carlo CasablancaCarlo Casablanca More articles by this author , Matteo DroghettiMatteo Droghetti More articles by this author , Carlo RoveroniCarlo Roveroni More articles by this author , Francesco CostaFrancesco Costa More articles by this author , Marco SalvadorMarco Salvador More articles by this author , Stefano PuliattiStefano Puliatti More articles by this author , Caterina GaudianoCaterina Gaudiano More articles by this author , Alberta CappelliAlberta Cappelli More articles by this author , Alessandro BertacciniAlessandro Bertaccini More articles by this author , Emanuela MarcelliEmanuela Marcelli More articles by this author , Angelo PorrecaAngelo Porreca More articles by this author , Bernardino De ConcilioBernardino De Concilio More articles by this author , Rita GolfieriRita Golfieri More articles by this author , Carla SerraCarla Serra More articles by this author , Antonio CeliaAntonio Celia More articles by this author , Riccardo SchiavinaRiccardo Schiavina More articles by this author , and Eugenio BrunocillaEugenio Brunocilla More articles by this author View All Author Informationhttps://doi.org/10.1097/JU.0000000000001998.05AboutPDF ToolsAdd to favoritesDownload CitationsTrack CitationsPermissionsReprints ShareFacebookLinked InTwitterEmail Abstract INTRODUCTION AND OBJECTIVE: Many nephrometry scores have been developed to quantify the complexity of renal tumours and to predict complications after partial nephrectomy. However, no specific nephrometry score have been developed for percutaneous local tumour ablation (LTA). To propose a novel nephrometry score (PERC-score) to predict the risk of postoperative complications in patients treated with LTA. METHODS: We retrospectively evaluated 160 patients with T1a renal mass treated with LTA at two tertiary centers (80 radiofrequency ablation [RFA], 80 cryoablation [Cryo]). To propose a score targeted for LTA, the following parameters were recorded, and a score was assigned to each item based on results of univariate logistic regressions: tumor’s size <2 cm (1), 2-3 cm (2) and 3.1-4 cm (3); renal hilum not involved (1) and renal hilum involved (2); no dislocation of urinary collecting system (UCS, 1) and dislocation/infiltration of UCS (2); technique of ablation, Cryo (1) and RFA (2). Total score was categorized in low (4-6) and high (7-9) risk, according to risk of complications. LOESS plot was produced using mean value of PERC-score to estimate the rate of complications predicted by the model. ROC curves were used to test the accuracy of different scoring systems (PERC, RENAL, PADUA and SPARE) in predicting overall complications. RESULTS: Overall, 23 (14.3%) postoperative complications were recorded. Median follow up was 34 months. Overall complications were significantly higher in patients with larger tumor size (>3 cm), renal hilum involvement, UCS dislocation/infiltration and higher PERC-score (all p≤0.04). At linear regression analysis, PERC-score revealed statistically significant correlation with postoperative complications (OR 3.6, CI 1.3-4.8, p<0.001). PERC-score showed higher accuracy to predict overall complications compared to PADUA, RENAL and SPARE score with AUC of 0.71 (CI 0.6-0.8, p=0.003) vs 0.65 (CI 0.5-0.8, p=0.01) vs 0.65 (CI 0.5-0.7, p=0.01) vs 0.65 (CI 0.5-0.7, p=0.02), respectively. CONCLUSIONS: PERC-score is easy to assess, basing on anatomic characteristic of renal mass from conventional imaging and more accurate than other nephrometry scores develop for partial nephrectomy to predict postoperative complications in patients treated with percutaneous ablation for T1a renal tumor. Source of Funding: None © 2021 by American Urological Association Education and Research, Inc.FiguresReferencesRelatedDetails Volume 206Issue Supplement 3September 2021Page: e279-e280 Advertisement Copyright & Permissions© 2021 by American Urological Association Education and Research, Inc.MetricsAuthor Information Lorenzo Bianchi More articles by this author Pietro Piazza More articles by this author Francesco Chessa More articles by this author Angelo Mottaran More articles by this author Carlo Casablanca More articles by this author Matteo Droghetti More articles by this author Carlo Roveroni More articles by this author Francesco Costa More articles by this author Marco Salvador More articles by this author Stefano Puliatti More articles by this author Caterina Gaudiano More articles by this author Alberta Cappelli More articles by this author Alessandro Bertaccini More articles by this author Emanuela Marcelli More articles by this author Angelo Porreca More articles by this author Bernardino De Concilio More articles by this author Rita Golfieri More articles by this author Carla Serra More articles by this author Antonio Celia More articles by this author Riccardo Schiavina More articles by this author Eugenio Brunocilla More articles by this author Expand All Advertisement Loading ...