MP47-07 DEFINING THE IMPACT OF PERCUTANEOUS RENAL BIOPSY ON RISK OF INTERVENTION FOR PATIENTS ON ACTIVE SURVEILLANCE FOR SMALL RENAL MASSES

likelihood of the patient undergoing a RN (p[0.011) (Fig 1a). The proportion of patients with one or more NOTES deviation was found to be significantly higher with increasing CCI in PN (p[0.01 for PN, p[0.31 for RN, fig 1b). CONCLUSIONS: The lower rate of PN in patients with increased comorbidities could be driven by patients more appropriately being treated on surveillance or RN as our data shows. Based on the NOTES deviations analysis, this is likely appropriate as patients treated with a PN have a higher number of deviations with increasing CCI. Specific comorbidities and factors driving these deviations need further investigation. As comorbidities and life expectancy are clearly an important variable to consider, the MUSIC-KIDNEY group developed a novel life expectancy calculator which is now live to aid treatment decision-making.