Nephrometry Scores: a validation of three systems for peri-operative outcomes in retroperitoneal robotic partial nephrectomy.

To externally validate the R.E.N.A.L., PADUA and SPARE nephrometry scoring systems for use in retroperitoneal RAPN.

Nephrometry scores were calculated for 322 consecutive patients receiving retroperitoneal RAPN at a tertiary referral centre from 2017.