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The study objective is to improve results of treatment of patients with low-risk prostate cancer (PC).Materials and methods. In the study, comparative analysis of data from 84 patients with low-risk PC was performed: 40 patients were included in the active observation group (group 1) and 44 patients underwent radical prostatectomy (group 2). For evaluation of functional responses the following questionnaires were used: Short Form 36 Health Quality Survey (SF-36), International Index of Erectile Function (IIEF-5), International Prostate Symptom Score (IPSS), Expanded Prostate Cancer Index Composite (EPIC-26). For control of oncological results, tests for prostate-specific antigen, digital rectal examination, magnetic resonance imaging of the pelvic organs with intravenous contrast, and confirmation biopsy of the prostate were preformed.Results. Mean score for the SF-36 questionnaire in the group 1 (active observation) at the beginning of the study was 63.2 ± 11.5 for mental health (MH) and 57.1 ± 9.8 for physical health (PH), while in the group 2 MH score was 63.1± 6.8, PH score was 56.2 ± 8.6. However, 18 months later in the group 1 mean MH score increased to 68.2 ± 10.1, mean PH score to 62.4 ± 7.8; in the group 2 PH score increased insignificantly to 64.2 ± 7.4 and PH score decreased to 54.8 ± 5.4 (p

Introduction. An original research work was performed to assess split kidney function by glomerular filtration rate (GFR) with mathematical analysis of the kidneys computed tomography (CT) data in patients with kidney stone disease (KSD). Objective was to evaluate the GFR and the parenchyma structure of each kidney and identify the possible patterns of contrast medium intrarenal transport with mathematical analysis of the kidneys CT data in patients with KSD.Materials and methods. Data of 27 patients of both genders with KSD were retrospectively analyzed. To evaluate GFR separately for each kidney we analyzed the data of contrast-enhanced CT (GFR reference values are 0.55 % of contrast medium per second). Inclusion criteria are as follows: 1) newly diagnosed SKD; 2) stone size ≤1,5-2,0 cm, no obstruction of the urine flow registered; 3) no kidney or upper urinary tract surgical history; 4) age - ≤45 years; 5) no severe chronic diseases. All of these allowed to minimize influence of any other disorders on split renal function except for SKD and conduct per se research.Results. The mathematic analysis of the contrast-enhanced CT data revealed GFR changes in 26 (96.3 %) out of 27 patients. Hyperfiltration was found in 12 (44.4 %) patients: right kidney GFR - 0.6-0.77 %, mean value - 0.65 %; left kidney GFR - 0.59-0.79 %, mean value - 0.67 %. Hypofiltration was found in 13 (48.1 %) patients: right kidney GFR - 0.2-0.54 %, mean value - 0.37 %; left kidney GFR - 0.2-0.53 %, mean value - 0.4 %. The GFR values significantly differed between the groups both for the right (p = 0.000014) and left (p = 0.000045) kidneys. We found no significant age-related difference between the groups (p = 0.895). As well as that no significant differences in Resistance Index both in magistral (right kidney: p = 0.221; left kidney: p = 0.850) and segmental (right kidney: p = 0.306; left kidney: p = 0.957) arteries between the groups with hyperfiltration and hypofiltration were observed. One patient demonstrated no changes in GFR, and the other one had hyperfiltration (0,62 %) in one kidney and hypofiltration (0,48 %) in another.Conclusion. Most of the patients (92.6 %) with SKD demonstrate GFR changes (either hyperfiltration or hypofiltration) that may indicate the disturbed intrarenal blood and urine flow through the kidney.