Randomized Study of Spinal Anesthesia Compared With Traditional Epidural Anesthesia Concerning Peroperative and Postoperative Pain After Open Nephrectomy in Patients With Renal Cell Carcinoma

Inclusion Criteria: * all patients in ASA score I - III, planned to be treated with open radical nephrectomy or nephron-sparing surgery having renal cell carcinoma Exclusion Criteria: * patients in ASA score IV-V, * patients with advanced tumour thrombus in vena cava inferior, * patients with high risk for bleeding * patients with previous chronic pain symptoms * patients having drug abuse * patients having cognitive deficiencies or dementia disease * patients with any contraindication of either spinal or epidural anesthesia * patients younger than 18 years and pregnant woman * patients having a weight less than 45 kg or weight over 120 kg