Four-arm robotic partial nephrectomy for complex renal cell carcinoma.

OBJECTIVES: Laparoscopic partial nephrectomy (LPN) remains challenging to even experienced laparoscopists. Complex renal tumors add an additional challenge to a minimally invasive approach to nephron-sparing surgery (NSS). We represented our technique and results of robotic partial nephrectomy (RPN) for hilar, endophytic, and multiple renal tumors.

MATERIALS AND METHODS: Between May 2006 and March 2008, 29 patients with complex renal tumors underwent RPN, including hilar (n = 14), endophytic (n = 12) and multiple tumors (n = 3).The hilar vessels were clamped with laparoscopic bulldog with warm ischemia. Follow-up ranged from 3 to 23 months (mean of 15 mo). The perioperative data and pathologic results were retrospectively reviewed.

RESULTS: Robotic partial nephrectomy procedures were performed successfully without complications. The mean diameter of tumors was 3.0 cm (range 2.0-4.0). The mean operative time was 197 minutes (range 172-259), and the mean blood loss was 220 ml (range 100-370). The mean warm ischemia time (WIT) was 25 min (range 16-43). The hospital stay averaged 2.5 days (range 2-3). Histopathology confirmed clear-cell carcinoma (n = 21), chromophobe cell carcinoma (n = 4), hybrid oncocytic tumor (n = 2), oncocytoma (n = 1), and cystic renal cell carcinoma (n = 1). All cases had negative surgical margins. At the 3-23 months (mean of 15 mo) follow-up, no patients experienced a significant change of glomerular filtration rate compared to preoperative levels and there was no evidence of tumor recurrence.

CONCLUSION: Robotic partial nephrectomy is a safe and feasible procedure. RPN is a preferred approach for complex renal tumors when NSS is indicated. For complex and technical challenging renal tumors, robotic assistance may provide patients the benefit of minimally invasive surgery.