Associating the learning curve and tumor anatomical complexity with the margins, ischemia, and complications rate after robot-assisted partial nephrectomy.

•The MIC system was found to be an easy and reproducible tool to standardize the evaluation of the early outcomes of RAPN.•The MIC rate increased with surgical experience and decreased with tumor anatomical complexity.•We confirmed that RAPN was less technically challenging with a less steep learning curve than LPN.