[Modern view on the problem of diagnostics of renal angiomioadenomatous tumor].

INTRODUCTION: Angiomyoadenomatous tumor as a nosological entity is not included in the latest version of the International Histological Classification of Kidney Tumors (WHO, 2022) and is related to provisional entity. Currently, there is no consensus among researchers about the nosological affiliation of an angiomyoadenomatous tumor. AIM: To comparatively analyze the histological, immunophenotypic, ultrastructural and molecular parameters of renal angiomyoadenomatous tumor and clear cell papillary renal cell tumor. MATERIALS AND METHODS: The study was performed on surgical specimen from 5 and 10 patients with renal angiomyoadenomatous tumor and with clear cell papillary renal cell tumor, respectively. Immunohistochemical study was carried out on paraffin sections according to the standard protocol. Antibodies HMWCK, AE1/AE3, 7, E-Cadherin, EMA, PAX8 and 9 were chosen. To study tumor tissues on semi-thin and ultra-thin sections, an electron microscope Philips TECNAI 12 BioTwinD-265 was used. For in situ fluorescent diagnostic detection, defined centromere probes, LSI 13/21, LSI N25 /LSI ARSA, TelVysion telomeric probe and a two-color VHL/CEP3 probe were used. RESULTS: Angiomyoadenomatous tumor is characterized by a three-phase structure. In contrast to clear cell papillary renal cell tumor, angiomyoadenomatous tumors show complete membranous expression of CA9. CONCLUSION: Our results allow to state that angiomyoadenomatous tumor and clear cell papillary renal cell tumor are different neoplasms.

[Urinary tract infection and overactive bladder. Is there an association?]

A discussion of key research findings dedicated to the relationship between urinary tract infection (UTI) and overactive bladder (OAB) is presented in the article. The results of the publications support the concept that UTI may be an underappreciated contributor to the development of OAB in some patients and vice versa. This information raises a number of questions regarding the treatment and diagnosis of OAB and UTI. The main question is the potential use of antibiotics, anti-inflammatory drugs, and other drugs in the treatment of patients with OAB, as well as the rationale for the use of therapy that normalize lower urinary tract (LUT) function in the presence of chronic recurrent UTI.

[Language, cultural adaptation and validation of the OABSS (Overactive Bladder Symptom Score) questionnaire in patients with overactive bladder].

AIM: To perform language and cultural adaptation and validation of the OABSS (Overactive Bladder Symptom Score) questionnaire among patients with overactive bladder (OAB), proposed as an effective tool for assessing the severity of symptoms and the efficiency of treatment in clinics of the Russian Federation. MATERIALS AND METHODS: In accordance with the protocols for carrying out such studies, the procedure of standardized forward-backward translation of the OABSS questionnaire was performed. Further, the intermediate Russian-language version was applied to 15 patients with subsequent correction of deficiencies and approval of the final Russian-language version of the questionnaire. In total, the study group included 176 patients of both sexes with OAB symptoms who filled out the questionnaire twice (test-retest) with an interval of 10-14 days. RESULTS: Based on the statistical analysis (Cronbach's alpha = 0.961), there was a significant degree of internal consistency of the sample. This fact is also supported by the very high retest reliability of the questionnaire (ICC >0.9). CONCLUSION: Our data showed that the Russian version of the OABSS questionnaire is a reliable and valid tool for subjective assessment of the severity of OAB symptoms.

[Morphological and molecular portrait hybrid renal tumors].

A hybrid tumor is not officially included in the latest International Histological Classification of Kidney Tumors (WHO, 2022), however, according to the literature, a number of researchers still consider a hybrid tumor as an independent nosological unit. In this regard, the development of morphological and molecular genetic criteria for a hybrid tumor, today, is the main task in the differential diagnosis of oncocytic renal tumors. AIM: Our aim was to carry out to identify immunohistochemical, ultrastructural features and determine the molecular profile of hybrid renal tumors. PATIENTS AND METHODS: The study was performed on the surgical material of 12 patients with a hybrid tumor of the kidney. Immunohistochemical study was carried out on paraffin sections according to the standard protocol. Antibodies CK7, CD117, Cyclin D1, EpCAM, Caveolin1, EABA, and S100A1 were used. To study tumor tissues on semi-thin and ultra-thin sections, an electron microscope Philips TECNAI 12 BioTwinD-265 is used. For in situ fluorescent diagnostic detection, defined centromere probes, LSI 13/21, LSI N25 /LSI ARSA and TelVysion telomeric probe. RESULTS: In some cases, a hybrid tumor is represented by a solid structure of monomorphic oxyphilic cells with a characteristic immuno-, ultraphenotype and molecular profile. CONCLUSION: The results of a comprehensive study confirm that the hybrid tumor is an intermediate link in the process of malignant transformation of oncocytoma into chromophobe renal cell carcinoma.

[Challenges in the clinical diagnosis and treatment of encrusted cystitis].

Encrusted cystitis (IC) is a rare chronic inflammatory disorder of the bladder characterized by mucosal inflammation with encrustations. This pathological process is directly related to the activity of urea-splitting bacteria in the urine. Bladder encrustations are deposits of ammonium and magnesium phosphate, as well as struvite, on the surface of the urothelium. However, the pathogenesis of this disease has not been thoroughly studied. Treatment of encrusted cystitis is aimed to complete eradication of the uropathogen, surgical removal of encrustations, and lowering urine pH. Early diagnosis is a key prerequisite for effective treatment.

[Efficacy of Uronext in chronic recurrent bacterial-viral cystitis with multiple resistance to antibacterial drugs].

Chronic recurrent cystitis (CRC) is one of the most common diseases of the lower urinary tract in the female population. Difficulties in diagnosis and treatment, despite the observance of modern clinical recommendations for CRC, are due to the versatility and polyetiology of the pathogenesis of the disease. The most difficult and discussed section of this problem is the diagnosis and treatment of CRC of papillomavirus (PV) etiology. The article presents its own clinical observation - Diagnosis and treatment of a patient with CRC PV etiology. CRC, in addition to bacterial uropathogens, can be caused by various representatives of a viral infection. Among all viral pathogens, HPV has the widest pathogenic potential. Currently, there is no single etiotropic therapy for PVI of the urinary tract and reproductive organs; there is no systemic treatment of patients with HPV-associated lesions, including the bladder. Nevertheless, an important principle of therapy, which has already become an axiom, is applied - an integrated approach that includes anti-inflammatory,antiadhesive, antiviral and immunoactive therapy.

[Overactive bladder in the structure of somatized depression].

In everyday practice, urologists often encounter clinical manifestations of overactive bladder (OAB), without of organic or infectious disease. In such cases, OAB may appears in the structure of a somatized (more often depressive) disorder, and therefore an integrated psychosomatic approach to such patient management is becoming increasingly relevant. The relevance of studying the topic is due to the high prevalence of OAB symptoms, its recurrent course, insufficient effectiveness of urological treatment, a significant decrease in the quality of life and working capacity of the socially active part of the adult population. Our clinical observation illustrates the development of symptoms of OAB with massive "pseudo-urological" symptoms within the framework of recurrent somatized depression in a woman of involutional age.

[Modern molecular-genetic aspects of histological variants of renal cell carcinoma].

The article presents the main molecular mechanisms of the pathogenesis of renal cell carcinoma. The molecular pathways that determine the development of histological variants of renal cell carcinoma and the role of stem cells markers in the carcinogenesis of these tumors are considered.

[Urinary incontinence in women and its impact on quality of life].

The prevalence of urinary incontinence at a young age is 20-30%, gradually increasing to 40% among older women. Urinary incontinence affects many areas of the patient's life, including social, psychological, work, sexual, etc. The main causative factors, which also influence on its severity, include age, pregnancy, childbirth and obesity. To date, there are many treatment methods for stress urinary incontinence. However, more preference is given to the sling procedures, in which mesh is placed under the middle part of the urethra. Despite being the "gold" standard for the treatment of stress urinary incontinence, it is difficult to determine indications for surgical treatment, since "nonmedical" view of the patient's problem is often required. The low awareness of primary care physicians about the possibilities of treating urinary incontinence often leads to an erroneous opinion in patients about their disease and methods of treatment. Many patients regard this condition as an integral part of aging, avoid situations in which urinary incontinence is possible, which limits daily activities, sexual activity, sports and other areas of life. Based on the latest data, a review of the literature on urinary incontinence in women, risk factors, as well as existing methods of surgical correction are presented in the lecture. Particular attention is paid to the impact of urinary incontinence on the quality of life of patients and current methods for its assessment.

[Ultrastructural features of histological variants of renal cell carcinoma].

The article presents the main electron microscopic signs of the main histological variants of renal cell carcinoma. The ultrastructural profiles of rare forms of renal cell carcinoma included in the latest International Histological Classification of Kidney Tumors (WHO, 2016) are considered.

[Ureteral obstruction and segmental ureteral stents].

Currently, various types of stents are widely used in urological practice. One of the indications is the presence of upper urinary tract strictures. The factors leading to the development of strictures can be endogenous and exogenous, iatrogenic and non-iatrogenic, benign and malignant. After open, laparoscopic and X-ray-endoscopic procedures a double-J stent is usually placed or, less often, nephrostomy tube. It should be noted that both methods have certain side effects and may affect the patient's quality of life. To reduce the stent-related symptoms and increase their tolerability, various modifications of ureteral stents have been developed. In this article, we analyze the publications devoted to the most commonly used segmental stents without renal and bladder coils, such as Memokath, Uventa, Allium, Memotherm and nitinol stents manufactured by MIT LLC.

[Outpatient urodynamic monitoring in patients with BPH: world and russian experience].

Outpatient urodynamic monitoring (AUM) - registration of the patients urination parameters for a certain time (for example, during the day), which is carried out in natural conditions for him. Monitoring allows you to identify hidden or periodically occurring (circadian) changes, which are not always possible to record with a single study. The research was searched in the PubMed and Elibrary.ru databases using the keywords "home uroflowmetry", "outpatient urodynamic examination", "outpatient urodynamic monitoring", "outpatient uroflowmetric monitoring". The difficulties in performing AUM lie not only in the hardware (the presence of a portable device, minimally invasive or non-invasive research, software that guarantees the storage and transmission of data), but also the difficulties associated with teaching patients and overcoming conservatism on the part of medical personnel. Today, there are several urodynamic devices and uroflowmeters designed for research at home. Outpatient (home) urodynamic monitoring is one of the most promising studies for implementation in everyday clinical practice in the provision of medical care to patients with urination disorders on the background of benign prostatic hyperplasia. The integration of home uroflowmetric monitoring into the eHealth system, of course, remains an inevitable trend in the development of modern healthcare.

[A complicated case of calcium urolithiasis in a carrier of SLC7A9 gene mutation responsible for cystinuria].

The article describes a clinical case of kidney stone disease (KSD) in a child of 4 y.o. with calcium urolithiasis. Analysis of chemical content of the kidney stones revealed their calcium-oxalate composition. According to the results of clinical exome sequencing the patient found to be a heterozygous carrier of a pathogenic variant c.695A>G (p.Tyr232Cys) in the gene SLC7A9, attributable for an autosomal recessive form of cystinuria type B. Because of the uroliths calcium composition the patient was also genotyped for SNPs in 15 genes involved in calcium metabolism. Polymorphisms associated with increased risk of calcium urolithiasis were found in 8 of 15 tested genes. The findings could explain clinical features of the patient.

[Socio-economic aspects of neurogenic dysfunctions in urology].

AIM: to evaluate the medico-economic significance of neurogenic lower urinary tract dysfunction (NLUTD) in the Russian Federation, to calculate the economic burden of NLUTD in patients with targeted entities and to prepare suggestions for improving the methods of payment for the provision of medical care to patients with NLUTD in inpatient practice. MATERIALS AND METHODS: an analysis of the literature and an expert assessment of the prevalence of NLUTD in the Russian Federation were performed. Due to the various etiology of NLUTD, the following entities were considered: craniocerebral trauma, acute stroke, multiple sclerosis, spinal cord injury (hereinafter referred to as targeted entities), characterized by the highest rate of NLUTD and high social significance (damage to the working-age population): traumatic brain injury, acute stroke, multiple sclerosis, spinal cord injury. The calculations of the economic burden of NLUTD and its main complications (stage 5 of chronic kidney disease (CKD), urinary tract infection) in the Russian Federation (using mainly the normative method) were carried out, based on national statistics, regulatory legal acts and expert assessments of healthcare specialists. Proposals have been prepared for improving the reimbursement (tariffs of the KSG) for payment of NLUTD in the inpatient practice. RESULTS: according to the study, the number of patients with NLUTD due to the group of targeted entities is estimated at 910 000. The economic burden (excluding indirect and unaccounted costs) of the NLUTD is 33.3 billion rubles per year. The burden associated with secondary complications (stage 5 CKD, urogenital infection) due to ineffective diagnosis and treatment of NLUTD is 51.6 billion rubles. The total costs on the NLUTD is estimated at 84.9 billion rubles. Direct costs, calculated by the normative method based on the analysis of standards of medical care per patient are 36,546 rubles per year. Provision of medical care to patients with NLUTD in accordance with federal guarantees within the framework of the compulsory medical insurance is provided in accordance with the tariffs of KSG st30.005 (profile "urology"). The KSG tariff for 2019 (taking into account the established standards of financial costs for one case of hospitalization in the inpatient department and the established cost-intensity coefficients (CZ) established by the CG is 21,495.07 rubles, which is 58% of the minimum need, excluding the cost of treatment of complications, according to the normative method of calculation. The real estimate of the tariff for the payment of treatment of NLUTD in the constituent entities of the Russian Federation is 35-38% of the minimum need, excluding the cost of treatment of complications, according to the normative method of calculation. The real estimate of the costs for the treatment of NLUTD in regions is 35-38% of the minimum need, excluding the cost of treatment of complications, according to the normative method of calculation. To provide effective specialized urological care in the framework of compulsory medical insurance at the rates of the CSG for neuro-urological care (st30.005), expert calculations of the actual cost of NLUTD therapy were made. The proposed average cost of the CSG and the values of the cost intensity factors: CSG (min) st30.005.1 - 39,936 rubles, CZ - 1.65; CSG (max) st30.005.2 - 68,531 rubles, CZ - 2.75. The weighted average savings while expanding the availability of complex neuro-urological care for patients with NLUTD in accordance with the proposed payment rates is 9.4 billion rubles per year. CONCLUSIONS: Evaluation of the prevalence and burden of NLUTD showed the high medical and economic significance of NLUTD in the Russian Federation. The results of the study indicate a significant discrepancy between the requirements and the real costs within federal guarantees for the organization of medical care for patients with NLUTD. To provide effective specialized urological care in the compulsory medical insurance at the rates of CSG for neuro-urological care, it is necessary to increase funding, through the correction at the federal level of the cost-intensity coefficient from 1.65 to 2.75 for the CSG st30.005, which will ensure the increase in the cost for a case of treatment in inpatient department in form 39 936 to 68 531 rubles. The weighted average savings while expanding the availability of complex neuro-urological care for patients with NLUTD in accordance with the proposed payment rates is 9.4 billion rubles per year.

[Molecular and genetic technologies for the diagnosis of monogenic forms of urinary stone disease: clinical cases].

Kidney stone disease (KSD) is an actual problem of modern health care. By now, more than 80 monogenic forms of urolithiasis have been described. To diagnose such forms of KSD different molecular genetic technologies are used. In the current article 5 clinical cases of KSD among the patients aged 1-9 years old are presented. All of them underwent comprehensive instrumental, clinical, laboratory and molecular genetic investigations. DNA analysis was carried out by Next Generation Sequencing method (NGS) (target NGS-panels and Whole Exome Sequencing). In all cases the molecular genetic cause of the disease was found - idiopathic infantile hypercalcemia type 1 (gene CYP24A1 - 3 cases) and cystinuria (gene SLC7A9 - 2 case). Several unknown genetic variants were found in CYP24A1 (c.1379G>T, c.1156A>T, c.1286T>C) and SLC7A9 (c.920T>A). The importance of genetic testing and the role of genetic counseling for patients with KSD were shown.

[Design and materials for ureteral stents: past, present and future].

Ureteral stents have a long history of use. Their main goal is to provide effective drainage of the upper urinary tract. Morbidity is mostly related to low biocompatibility of materials, from which stents are made. Since stent introduction, there have been many stages of evolution and modernization. However, there is a significant problem associated with their widespread use. Despite technological progress, stent-associated symptoms, incrustation, bacterial infection are the problems that still have to be resolved while creating an "ideal" stent. The continued development of new materials and coatings also will lead to the improvement of such an indispensable urological device as the ureteral stent.

[Genetic aspects of primary hyperoxaluria: diagnostics and treatment].

Primary hyperoxaluria is a group of inherited metabolic diseases characterized by increased formation of calcium-oxalate stones in kidneys with development of nephrolithiasis and chronic kidney disease. The article summarizes the modern information on the diagnostics and treatment of the disorder depending on genotype of the patient (AGXT, GRHPR, HOGA1 genes). The evaluation of the molecular genetic aetiology of the kidney stone disease contributes to the personalized treatment and prevention of the pathology in the patients and their relatives.

[Rationale of efficiency and safety of using beta3-adrenergic receptor agonist for treatment of overactive bladder].

Currently, antimuscarinics are the most commonly used drugs for the treatment of overactive bladder (OAB). Improving quality of life and treatment satisfaction are key factors for adherence to therapy. Mirabegron, the first drug in the class of b3-adrenergic receptor agonists, is used as an alternative to antimuscarinic drugs in the treatment of OAB and it has proved efficacy and excellent safety profile. Observational studies can provide data on the efficiency of therapy in routine clinical practice, and real-life data indicate that the duration of treatment with mirabegron may be longer compared with that of antimuscarinic drugs. A prospective study (BELIEVE) has been the largest European study which evaluated quality of life, treatment satisfaction and adherence to therapy in patients with OAB who were prescribed mirabegron in routine clinical practice. The BELIEVE study has been approved by regulatory authorities in all participating countries based on local requirements. The primary end point was to evaluate the change in quality of life compared to baseline based on the OAB questionnaire. Secondary end points included evaluating treatment duration, patient satisfaction, use of health resources, and side effects. Subsequent observation was provided for 12 months with follow-up visits after 2-4 and 10-12 months of therapy. A total of 862 862 patients from 8 European countries were included in the study. 73.7% of patients were women, and the average age was 61.2 years; 47.7% of patients were older than 65 years. At the beginning of the study, 41.3% of patients preferred other types of treatment, 42.2% were treatment-nave, 10.1% dropped out of the study, 6.4% received combination therapy. Storage symptoms and general quality of life improved from baseline to 2-4 and 10-12 months. There was a marked improvement in continence rate, increasing from 34.9% at the beginning to 43.7% after 10-12 months, and the use of pads decreased. Adherence to therapy was at a high level: 53.8% of patients continued taking mirabegron after 10-12 months. In general, no unexpected adverse events were observed, and they were consistent with the described safety profile of mirabegron. Patients receiving mirabegron reported a significant improvement in their quality of life and health status, while the level of adherence for the drug was 53.8% for 12 months. No unexpected safety problems were found, and side effects were consistent with previously described safety profile.

[Conservative management of rectourethral fistula: modern treatment].

INTRODUCTION: & Objectives. Rectal injury and recto-urethral fistula (RUF) formation are severe complications after surgical treatment of prostate cancer . There are various surgical techniques as well as conservative methods for the treatment of RUF. Nonsurgical approach can be used in nontoxic, minimally symptomatic patients. MATERIALS & METHODS: From 2012 to 2016, 825 patients (mean age 68y) with LPR to be performed were recruited in the study. Postoperatively RUF developed in 7 patients (0.8%) in average in 10 days after surgery. Five cases were uncomplicated presented with pneumaturia, dysuria or urine per rectum. Two patients with fecaluria and previous history of radiotherapy or androgen deprivation were excluded from the study group. Conservative management include: 1)bowel rest 2)broad-spectrum antibiotics after urine culture 3) fully absorbable diet (combination of parenteral and enteral nutrition) 4) bladder drainage (urethral catheter or suprapubic tube). Duration of conservative treatment was 4 weeks. After treatment all patients underwent a voiding cystourethrogram. RESULTS: During the treatment one patient has developed severe UTIs and surgical treatment were perfomed. The remaining 4 patients had spontaneous healing of the fistula and normal cystourethrogram. With the median follow up of 24 month after RUF treatment all 4patients had no fistula signs and they were fully continent. Overall RUF closure using nonsurgical treatment was successful in 4 of 5 cases (80%). CONCLUSIONS: Conservative management of RUF is a highly effective option which can be used to avoid major surgery and temporary colostomy. Nonsurgical treatment is a feasible method in selected patients with RUF.