TECHNICAL ADVANCE o s

There are various approaches and options for radical neph-rectomy (RN) for renal cell carcinoma (RCC): an open or laparoscopic approach; transperitoneally or retroperitone-ally; via a single port, multiple ports, or a small incision; and with the patient in the supine position or flank pos-ition. However, the current RCC guidelines recommend the laparoscopic approach as the standard treatment or preferred option for T2 RCC patients [1,2]. Laparoendo-scopic single-port surgery (LESS)-RN was recently devel-oped. In LESS-RN, all instruments are inserted via a small incision with [3] or without carbon dioxide [4-6]. For LESS-RN without carbon dioxide, Kihara et al. [7] devel-oped gasless laparoendoscopic single-port surgery RN (GasLESSRN), which was previously termed “portless endo-scopic urologic surgery ” (PLES) [5] or “minimum incisio