[Effect of a simple kidney cyst on renal function].

INTRODUCTION: Renal cysts are a common disease that occurs at a rate of 7-10%. Currently there are no clinical recommendations for the treatment of patients with simple renal cysts. In the current literature there is some evidence that a simple renal cyst has negative effects on renal function. Decreased renal function occurs due to partial atrophy and loss of the renal parenchyma (in the "crater" area at the base of the cyst) caused by compression. Therefore, the efforts to analyze the effect of simple kidney cysts on kidney function and identify the characteristics of the cyst that affect renal function to determine the indications for surgical treatment remains a substantial task. The aim of the study was to analyze the effect of simple renal cysts on renal function, to investigate the relationship between cyst size, atrophied parenchyma volume, and renal function, and to determine indications for surgical treatment of simple renal cysts. MATERIALS AND METHODS: We conducted a prospective cohort study. The study included 109 patients with simple renal cysts. Patients with a solitary cyst of the right or left renal kidney, grade I-II according to Bosniak classification, were included in the study. The estimated glomerular filtration rate (eGFR) of the patients was calculated using various formulas. A contrast CT scan of the urinary tract was also performed to determine the maximum size of the cyst, calculate the volume of the renal parenchyma, and the volume of the lost (atrophied) parenchyma. Patients underwent renal scintigraphy with calculation of total GFR and split renal function. We analyzed the symmetry of the function of both kidneys by comparing the GFR of the affected and healthy kidneys, analyzed the relationship between the presence of a kidney cyst and a decrease in GFR, between the maximum size of a renal cyst and a decrease in its function compared with that of a healthy kidney. We also analyzed the correspondence of total GFR values obtained in renal scintigraphy and GFR values calculated according to the formulas. RESULTS: Data from 109 patients were available for analysis; the mean blood creatinine was 87.4 mol/L. The median maximum cyst size was 80 mm. The median baseline volume of the affected kidney parenchyma was 174 ml, the median volume of the lost parenchyma was 49 ml, and the median proportion of the lost parenchyma was 28%. The median total GFR was 77.07 ml/min. The median GFR of the healthy kidney was 45.49 mL/min, and the median GFR of the kidney affected by the cyst was 34.46 mL/min. The median difference in GFR of the healthy and affected kidney units was 11 mL/min and was statistically significant. Comparison of the eGFR values obtained by the formulas with the reference values of GFR obtained by scintigraphy showed that the Cockcroft-Gault formula with standardization on the body surface area calculated closest eGFR values to the reference ones. Correlation analysis revealed a statistically significant association between the proportion of lost parenchyma volume and the maximum cyst size: =0.37 with 95% CI [0.20; 0.52] (p-value = 0). A multivariate logistic regression model revealed that a statistically significant factor influencing the probability of a significant decrease in GFR was the percent of lost renal parenchyma volume (OR=1,13; =0). CONCLUSIONS: Our study showed that growth of renal cysts associated with renal parenchyma atrophy and decrease of GFR of the affected kidney. An increase in the volume of atrophied parenchyma leads to the decrease in GFR of the affected kidney. The obtained data suggest that performing dynamic renal scintigraphy to assess the decrease in affected renal function and determine the indications for surgical treatment of renal cysts is a reasonable recommendation. According to the results of the study, the loss of 20% of the renal parenchyma can be considered an indication for renal scintigraphy. The Cockcroft-Gault formula with standardization on the body surface area allows to calculate closest GFR values to those obtained by scintigraphy and, therefore, can be recommended as the optimal formula for calculating eGFR in daily clinical practice.

[Current state of metaphylaxis of urinary stones in Russian Federation].

INTRODUCTION: Urolithiasis is one of the most common urological diseases in adults. Increased life expectancy of the population in developed countries, make urolithiasis topical issue and requires close attention. Due to the high risk of recurrent stone formation causing repeated surgical interventions, the issue of effective urinary stone metaphylaxis is very important today. MATERIALS AND METHODS: To study the current state of the problem of urolithiasis metaphylaxis among Russian urologists, an anonymous questionnaire was applied. A 25-question questionnaire was sent to e-mail to more than 4,000 Russian urologists. A total of 1,238 specialists completed the questionnaire. The database compiled from the received responses was processed and presented with descriptive statistics in the form of tables and charts. RESULTS: According to the survey, more than half of the 831 (67.1%) specialists specialized in the treatment of urolithiasis. It was noted that 626 (86%) inpatient urologists and 205 (40%) outpatient urologists specialized in the treatment of urolithiasis. Only 521 (69.6%) urologists specializing in surgical treatment of urolithiasis give a patient a stone fragment to analyze its chemical composition. At the same time, half of the respondents reported that less than 10% of patients come to them for further metaphylaxis. One of the main reasons for not analyzing the chemical composition of the stone was the fact that 877 (70,84%) specialists indicated the inaccessibility of analysis under the state guarantee program, 503 (40,63%) specialists indicated the patients satisfaction with the results of minimally invasive surgical treatment and lack of sufficient motivation for further examinations. At the same time, less than 3% of specialists can perform stone analysis within the framework of the state guaranty program. 1180 (96,8%) respondents practiced the prophylaxis of recurrent calculi formation, but only 336 (28,47%) performed comprehensive metabolic examination of all patients followed by prescription of drug therapy and appropriate diet. CONCLUSIONS: Our survey revealed low involvement of urologists at the outpatient level in the process of conservative treatment and metaphylaxis of urolithiasis, low activity of urologists in performing complex metabolic study and comprehensive prevention of recurrent stone formation, low percentage of performing chemical composition analysis of stone and low activity of urologists in performing primary litholytic therapy of urate stones. Based on this analysis of the responses of most Russian urologists, it is possible to formulate recommendations to remove the obstacles to providing patients with urolithiasis with quality medical care in terms of conservative therapy and metaphylaxis of urolithiasis.

[Robot-assisted pelvic floor reconstruction: review and own experience].

Pelvic organ prolapse (POP) is the most common urogynecological disease in women of middle and older age groups. This disease causes numerous urogenital symptoms and significantly reduces the quality of life of patients. Surgical correction of POP is the optimal method f treatment for this category of patients, however, the choice of surgery and access remains controversial. In recent decades, thanks to the development of robotic technologies, the use of robot-assisted sacrocolpopexy (RAS) has become increasingly popular. Numerous studies have shown the equivalence of results compared with the "gold standard" repair of prolapse - open sacrocolpopexy. This article presents a review of the current literature and our own experience of RAS.

[Lower urinary tract symptoms among women in the Russian Federation: data from an online survey].

AIM: To estimate the prevalence and severity of lower urinary tract symptoms in the female population using a LUTS-specific questionnaire. MATERIALS AND METHODS: The study analyzed the prevalence of LUTS in the population of women residing in the Russian Federation. Information about voiding disorders in women, which was announced on federal television health-related programs, was posted on the website of the medical portal zdorovieinfo.ru. All questionnaires were filled in by the patients anonymously. The questionnaire was prepared by the editors of the website. We analyzed the survey results. RESULTS: After the TV announcement, the survey website was visited by more than 15,000 people. Of them, 2,600 people filled the questionnaire (17% of the number of visitors). The findings of the survey suitable for the analysis were obtained from 2419 women (93.07%) and 181 men (6.93%). The mean age of female participants was 55 years old. CONCLUSION: The study had some limitations and was not truly epidemiological, as it involved only those women who had information and technical access to the Internet portal and questionnaires. Despite this, the findings suggest the high prevalence of LUTS among women in our country.

[Complications of percutaneous nephrolithotomy and their management].

To date, percutaneous nephrolithotomy (PNL) is the standard treatment modality for large-volume renal stones and staghorn stones in patients with urolithiasis. Despite low invasiveness, this method is not without complications. This review discusses the most common complications and suggests methods for their prevention and appropriate management. To unify the study of complications they were categorized based on the modified Clavien classification. According to the available data, about 80% of the PNL complications belong to grade I-II complications and does not require any additional treatment. The most serious complications include sepsis, bleeding, and injury to nearby organs.

[Current methods of early diagnosis of prostate cancer].

Prostate cancer is the most common cancer among men, except for lung cancer. Therefore, it is imperative to identify diagnostic methods for early detection of prostate cancer to determine patients from healthy populations, which helps guide a timely treatment at an initial stage of the disease. The article provides an in-depth review of the most current diagnostic biomarkers of prostate cancer, their role in clinical practice as a means of the early detection and screening for prostate cancer.

[The place of mirabegron in clinical practice].

Currently, a wide range of different drugs is available for te management of overactive bladder. This creates problems when it comes to drug selection and personalized care for each patient. Mirabegron is the only 3-adrenomimetic agent for the treatment of urinary disorders, which, after careful long-term multi-center randomized trials, has been approved for use in Europe and North America. Mirabegron has proven to be very effective in patients who had previously received anticholinergic drugs and discontinued them because of the insufficient therapeutic effect or pronounced adverse reactions. However, the question of using Mirabegron as a first-line treatment for overactive bladder and the existing limitations in its administration in clinical urology practice remains open.