Material and methods
We analyzed our series of 32 consecutive patients (two with 2 tumours and 1 with 4 bilateral tumours), for a total of 37 robotic nephron-sparing surgery, performed between June 2008 and July 2012. The technique differs depending on tumour site and size.

Results
The mean tumour size was 3.6 cm. No conversion in open surgery. Vascular clamping was performed in 22 cases with a mean warm ischemia time of 21.5 minutes and the mean total procedure time was 149.2 minutes. Mean estimated blood loss was 187.1 ml. Mean hospital stay was 4.4 days. Histopathological evaluation confirmed 24 cases of clear cell carcinoma, 3 chromophobe tumours, 1 collecting duct carcinoma, 5 oncocytomas, 1 leiomyoma and 1 cavernous haemangioma, 2 benign cysts. Associated surgical procedures were performed in 10 cases The mean follow-up time was 28.1 months. Intraoperative complications were 3 cases of important bleeding not requiring conversion to open or transfusions. No evidence of tumour recurrence in the follow up.

Conclusion
Robotic nephron-sparing surgery is a safe and feasible technique. Robotic technology in our experience made it possible a safe minimally invasive management, including vascular clamping, tumour resection and parenchyma reconstruction, especially in challenging situations: hilar, posterior or intra-parenchimal localization.