Kidney tumor surgery takes about 2-4 hours, depending on the size of the tumor or the type of surgery. In general, the operation time is about 2 hours if radical total nephrectomy is performed, that is, the tumor is removed together with the kidney. If laparoscopic surgery is used, the operation time is about 2.5 hours. If partial nephrectomy is used, that is, removing the tumor while preserving the normal kidney tissue, the operation will take about 4 hours. The surgery time will be longer because the surgery to preserve the kidney is more difficult than the surgery to remove the kidney and its tumor completely. Moreover, the probability of intraoperative bleeding is relatively higher for kidney preservation surgery, so close hemostasis is required to complete the surgery. If laparoscopic partial nephrectomy is performed, the operation time is about 4-4.5 hours, and the larger the tumor size, the longer the operation time will be.