Renal Nephrometry Score And Predictors Of Pathologic Upstaging In Patients Undergoing Partial And Radical Nephrectomies.

412 Background: To examine the predictive capability of pre-operative anatomic imagining characterization of the R.E.N.A.L. Nephrometry Score (RNS) in assessing pathologic upstaging of clinical T1 (cT1) lesions to pathologic T3 (pT3) in partial and radical nephrectomy specimens. Methods: We conducted a retrospective review of all patients undergoing radical and partial nephrectomies between January 1, 2011 and May 31, 2014 for cT1 renal masses. All pre-operative imaging scans were reviewed and the R.E.N.AL. Nephrometry score (radius for tumor size as maximal diameter, exophytic/endophytic tumor properties, nearness of deepest portion of tumor to collecting system or sinus, anterior/posterior descriptor and location relative to polar line) was applied to each scan. Chi-square, Fisher exact test, and Student t test were utilized to examine associations. Results: Of the 229 patients who underwent partial or radical nephrectomy for cT1, 124 (54%) underwent partial nephrectomy. On pathologic evaluation 195 (85...