Galler, Isabella J

AbstractBackgroundRenal tumor scoring systems, such as the contact surface area value, aim to assist in predicting outcomes following robotic‐assisted partial nephrectomy. The aim of this study is to identify associations between specific postoperative outcomes and the contact surface area of renal masses.MethodsWe analyzed 332 consecutive robotic‐assisted partial nephrectomies and calculated contact surface area for renal tumors with the contact surface area formula (CSA = 2πrd), where π ≈ 3.14, r = greatest tumor radius (cm), and d = greatest tumor depth (cm).ResultsHigher contact surface area was associated with longer warm ischemia time (P < .001), higher estimated blood loss (P < .001), and longer length of hospital stay (LOS) (P < .001). Higher contact surface area was significantly associated with decreased renal function at 1 day, 1 month, and 6 months following robotic‐assisted partial nephrectomy.ConclusionsContact surface area is associated with certain outcomes following robotic‐assisted partial nephrectomy and may be a useful predictive tool.