PD23-06 PREDICTION OF POST-OPERATIVE EGFR IN PATIENTS UNDERGOING RADICAL NEPHRECTOMY: HARDER THAN IT LOOKS (ON SCANS)

INTRODUCTION AND OBJECTIVES:Most recent AUA guidelines suggest that an expected drop of estimated glomerular filtration rate (eGFR) below 45 ml/min/1.733 upon radical nephrectomy (RN) should guide decision-making between RN and partial nephrectomy (PN) in patients with anatomically complex tumors. However, limited clinical tools are available to help with this assessment. Here, we examine the correlation between nuclear renal scan (NRS) -measured split renal function (nSRF) and renal parenchyma anatomic-measured (volumetric-estimated) split renal function (aSRF) in patients who underwent RN. We further assess the predictive value of nSRF and aSRF in anticipating post-operative eGFR decline after RN.METHODS:From our prospectively-maintained renal database, we identified patients with an enhancing renal mass who had both NRS and multiphase CT performed prior to RN. The average of three varying formulations for calculated renal parenchymal volumes was utilized. aSRF was determined by the ratio of the residua...