LAUSR

OBJECTIVE To report early institutional experience with the single-port robotic platform and compare perioperative outcomes between single port robot-assisted partial nephrectomies (SP-RAPN) and multiport robot-assisted partial nephrectomies (MP-RAPN) when utilizing a retroperitoneal approach. METHODS A retrospective chart review of patients who underwent a SP-RAPN or MP-RAPN at our institution between 11/01/2013 and 05/30/2021 was performed. Surgical platforms were compared via univariate analysis using the Kruskal-Wallis test for continuous variables and χ2 test for categorical variables. RESULTS A total of 20 SP-RAPN and 42 MP-RAPN were performed utilizing a retroperitoneal approach. Patients who underwent SP-RAPN were more likely to have a lower R.E.N.A.L. score (4 vs 6; p=0.0084) and their masses tended to be more exophytic, although this was not statistically significant (p=0.0535). Patients undergoing SP-RAPN had a shorter postoperative length of hospital stay (1 vs 2 days; p<0.0001). There were no significant differences in operative time, estimated blood loss, ischemia time, positive margin rate, malignant histology, postoperative complication rate, or Clavien-Dindo complication grade. CONCLUSION Retroperitoneal SP-RAPN appear to be safe without compromising perioperative outcomes when compared to MP-RAPN for low-complexity renal masses. Further studies are recommended to assess the role of the SP for higher-complexity renal masses and to characterize variables that influence the observed difference in length of hospital stay.