What Is Known? 
The partial nephrectomy is preferable management due to preserving renal function. However, studies still show controversial results. The prospective randomized controlled trial by the EORTC suggested that RN resulted in superior overall survival compared with PN. There are factors described for preserving renal function, such as the preoperative parenchymal quality, the volume of the preserved parenchyma, and ischemia time and type.