Aim. To analyze the results of treatment of patients with kidney tumors in urology departments of the Siberian State Medical University clinics.Materials and methods. The number of patients with kidney tumors hospitalized in the urology department of the general surgery clinic was 7–10 % of the total annual number of surgical interventions in the urology department. We analyzed 132 cases of malignant kidney tumors. All patients went through imaging and laboratory studies.Results. Treatment results are known in 125 (94.0 %) patients. Mean age of patients was 57.9 years (27 to 86), there were 77 men and 55 women (1.4:1 ratio). Mean tumor size was 6.5 ± 3.6 cm, no significant differences were observed between men and women. Radical nephrectomy was performed in 75 (56.8 %) patients, kidney resection in 57 (43.2 %) patients. Tumor size in nephrectomy cases was 8.2 ± 3.7 cm and 4.3 ± 2.1 cm in kidney resection (p <0.05). In patients with larger tumors five-year survival was lower: tumor size £4 cm was associated with five-year survival of 79.6 %, while tumor size >7 cm with only 36.9 % (p = 0.001).In our study, 23 (17.4 %) patients with inferior vena cava thrombosis were operated on: 11 (8.3 %) men, 12 (9.1 %) women. Mean age of patients with inferior vena cava thrombosis was 57.2 years (between 35 and 74 years). In this group of patients, mean tumor size was 10.8 ± 4.1 cm (between 4.2 and 19). Based on TNM classification, tumors were classified as follows: T3b stage – 17 (12.9 %), T4 stage – 6 (4.5 %), N0 – 15 (11.4 %), N+ – 8 (6.1 %). Left kidney was affected in 6 (4.5 %) cases, right kidney was affected in 17 (12.9 %) cases. Type of surgery performed in this group of patients was classified as: radical nephrectomy with thrombectomy and lymphadenectomy, one case included resection of the inferior vena cava with a section reconstructed using a xenopericardial transplant. Mean surgery duration was 212.4 ± 52.3 (130–320) minutes. Mean blood loss volume was 1177.0 ± 933.4 (100–4600) ml. Postoperative complications were observed in 35 (21.2 %) patients. Overall five-year survival for patients with malignant kidney tumors was 61.8 %, for patients with tumor thrombosis it was 31.3 %.Conclusion. Surgical treatment of patients with malignant kidney tumors allows to significantly improve patients’ survival preserving quality of life.