bluuebunny/crossref_metadata_2025_split huggingface dataset:
Validation of Numerical Modelling Techniques in Unsaturated Slope Behaviour
Authors:   Civil Engineering Programme, Faculty of Engineering & Built Environment, Universiti Kebangsaan Malaysia, Bangi, Malaysia, Mohd Taib Aizat , Taha Mohd Raihan ,   Smart and Sustainable Township Research Centre (SUTRA), Faculty of Engineering & Built Environment, Universiti Kebangsaan Malaysia, Bangi, Malaysia, Abang Hasbollah Dayang Zulaika ,   Department of Geotechnics and Transportation, Faculty of Civil Engineering, Universiti Teknologi Malaysia, Johor, Malaysia
Published: May 2023

Knowledge in modelling unsaturated slope behaviour remains limited. Research findings have challenged the common assumption of fully saturated conditions for all soil problems thus widening the perspective of partially saturated states. The calibration of unsaturated soil parameters requires good understanding of the soil-water characteristic curve (SWCC) and the permeability functions. The modelling of unsaturated slope behaviour involves the setting out of the model geometry, boundary conditions and flux boundaries when it comes to rainfall. It is a norm where certain unobtainable data had to be assumed and the results are consequently under or overestimated. Hence, this paper aims to validate the numerical techniques in modelling the groundwater flow and safety analyses for a slope model under the effect of typical rainfall in Hubei, China. The model is developed using Finite Element package; Plaxis and the results are compared to the field results and literature findings. The important parameters of hydrological and mechanical properties were gathered from the literature along with the boundary conditions. The flux boundaries are presented by simulated rainfall for a period of one month and the calculation is conducted in transient flow analysis. The results in terms of pore-water pressure are well validated with minor differences which can be explained by the unavailability of data for example the void ratio used and exact location of measurement taken in the field and literature findings. The analysis is also extended to calculate the factor of safety which contributes to familiarising the techniques in modelling by means of utilising the phi-c reduction method. In summary, the results demonstrated that the numerical modelling of unsaturated slope behaviour can be undertaken provided that all major information such as soil parameters, slope geometry and boundary conditions used are available and reliable.
Possibility of modification of peripheral blood neutrophils functional activity during chemoradiotherapy in patients with anorectal cancer
Authors: Slepov E. V. , Zukov R. A. , Serbaeva M. S. , Karapetyan A. M. , Kashaeva O. V. , Pavlenko A. Yu. , Kozina Yu. V. 
Published: May 2023

Background. Ionizing radiation is an effective antitumor therapy, but it has a serious negative effect on the immune system requiring the use of radiation reaction prevention and reduction methods. Neutrophils are a sensitive element of the immune system both in interaction with tumor tissue and in response to radiation injury.Aim. To evaluate functional activity of peripheral blood neutrophils by chemiluminescent analysis in patients with anorectal cancer after radiotherapy.Materials and methods. The study included 80 patients with anorectal cancer. Patients received chemo- and radio-therapy with 3D conformal radiotherapy and radiation therapy under visual control, followed by the use of radioprotector and without it. Neutrophil activity determined by chemiluminescent analysis.Results. In patients with anorectal cancer found maximum spontaneous and induced chemiluminescence acceleration. The chemiluminescence activation index with luminol is lower in patients with anorectal cancer, and with lucigenin shows no differences with the control group. The low luminol chemiluminescence maximum intensity, as well as the decrease in the synthesis of reactive secondary oxygen species in enzymatic systems, is likely regulatory intracellular limitations consequence. After treatment, patients with radioprotector showed a decrease in the number of parameters with statistically significant differences with the control group. Undesirable phenomena associated with sodium deoxyribonucleate therapy not detected in anorectal cancer patients during radiotherapy and subsequent observation period.Conclusion. During treatment, differences in chemiluminescence parameters suggest that ionizing radiation affects them in patients with anorectal cancer receiving standard chemoradiotherapy. Use of chemoradiotherapy with a radioprotector leads to indirect restoration of cellular functional activity. This is confirmed by luminol-dependent chemiluminescence faster reaching its maximum and a decrease in the number of significant differences from the control group after the start of the drug treatment.
Modern mRNA-based molecular diagnostics for prediction of urothelial carcinoma behavior
Authors: Startsev V. Yu. , Vorobyov S. L. , Tyapkin N. I. , Saad A. E. , Kondratiev G. V. 
Published: May 2023

Background. Bladder cancer, or urothelial carcinoma, is a common, aggressive, and still difficult to predict disease. For adequate therapy, timely diagnosis is essential since early detection of this tumor can significantly increase patient's survival at any age. Molecular genetic studies in cancer patients, including those with urothelial carcinoma, are becoming increasingly important. A number of major molecular genetic biomarkers of urothelial carcinoma are described in the world literature and used in clinical practice, however, information on the role of microRNA (miRNA) studies in the diagnosis of this disease has become available only in recent years.Aim. To examine information of the world literature on the significance of miRNA identification in resected bladder tissues with non-muscle invasive urothelial tumors.Materials and methods. We studied information from the world medical literature in the PubMed, CrossRef and Scopus databases dated between 2001 and 2022 on the significance of miRNA identification in resected bladder tissues with non-muscle invasive urothelial tumors.Results. The results of the studies demonstrate that predictive levels of some miRNAs, as well as their associated proteins, should be assessed in the original tumor tissue and urinary vesicles in different clinical settings. The use of molecular genetic research, as one of the new diagnostic methods, will allow to personalize treatment for a particular patient and, if necessary, make a choice in favor of a more aggressive treatment method. In turn, this will increase the overall survival and quality of life of patients with aggressive tumors.Conclusion. The next few years may bring many new discoveries that will help to unlock the secrets of miRNA dysregulation in urothelial carcinoma, leading to development and application of new targeted therapies in this patient population.
Epidemiological review of multiple primary malignant neoplasms of the prostate, kidney, and bladder
Authors: Mylnikov A. M. , Maslyakova G. N. 
Published: May 2023

Background. In recent years, an increase in the incidence of multiple primary malignancies has been observed. Multiple primary malignancies are an independent occurrence and development of two or more neoplasms of different histological origin in one patient.Aim. To evaluate epidemiological, clinical and morphological aspects of primary multiple malignant neoplasms of the prostate, kidney, and bladder.Materials and methods. Data analysis of the work report of the Saratov region oncological service in 2019, presented by the Regional Clinical Oncological Dispensary, patient case histories in the archive of the medical information system was performed.We performed a comparative analysis of the literature sources and data we obtained based to the following criteria: topographic anatomical combination of tumor locations, distribution of tumor combinations depending on time of occurrence (synchronous, metachronous), dynamics of urogenital multiple primary malignancies diagnosis in 2012-2019, distribution by gender and age, combination of stages of tumor process in both tumors, distribution by combination of histological types.Results. Between 2012 and 2019, 783 cases of multiple primary tumors with lesions in the urogenital system were identified. We studied 186 cases with a combination of two malignant neoplasms in the prostate, kidney, and bladder. Tumors developed synchronously in 36 % of patients, metachronously in 64 %. Mean patient age was 75 years. Half of the cases were in the group of localized stages - 90 (48.4 %), with the most common combination of TI-TII stages observed in 46 (24.7 %) cases. Combinations of acinar adenocarcinoma of the prostate with urothelial carcinoma of the bladder (34.7 %), clear cell renal carcinoma (27.8 %), papillary urothelial carcinoma of the bladder (12.5 %) were the most common according to histological diagnosis of primary multiple tumors of the urogenital system.Conclusion. Over the recent years we can observe a steady growth of diagnosable urogenital multiple primary malignancies. Morphological verification of the tumor and revelation of the most frequent histological types allows to assume the presence of the common mechanisms of development and the influence of tumor microenvironment on the growth of both tumors in a multiple primary malignancies pair.
Retroperitoneoscopic access in organ-preserving treatment of renal cell carcinoma
Authors: Chaykov V. S. , Dementyev I. O. , Karyakin O. B. , Shchukina E. O. , Troyanov A. V. , Ivanov S. A. , Kaprin A. D. 
Published: May 2023

Background. Renal cell carcinoma is one of the most common urologic cancers. Due to development of modern diagnostic methods, kidney tumors are often diagnosed at early stages (cT1a-T1b). The golden standard of treatment of localized renal cell carcinoma is tumor resection. In retroperitoneoscopic access, the time to artery access is decreased, the risk of intra- and postoperative complications is reduced. Retroperitoneal access is preferable for tumors located on the lateral or posterior kidney surface.Aim. To analyze the results of treatment of patients after retroperitoneoscopic kidney resection.Materials and methods. Between 2018 and 2021, at the A.F. Tsyb Medical Radiological Research Center - branch of the National Medical Research Radiological Center 47 retroperitoneoscopic kidney resections were performed (29 (61.7 %) in men, 18 (38.3 %) in women) due to stage cT1aN0M0 renal cell carcinoma. Retrospective analysis of demographic data, comorbid status, tumor characteristics, operative time, blood loss volume, frequency and severity of complications per the Clavien-Dindo classification was performed. Complexity of resection was evaluated using the R.E.N.A.L. scale.Results. Mean patient age was 63 (38-79) years, body mass index was 29.9 (22-39) kg/m2. Tumor of the left kidney was diagnosed in 24 (51.0 %) cases, of the right kidney - in 22 (46.8 %) cases, bilateral lesions - in 1 (2.2 %) case. Mean tumor size was 22.4 (11-39) mm. Resection had low complexity in 35 (74.5 %) cases, intermediate complexity in 12 (25.5 %) cases. Mean operative time was 156 (80-280) minutes, mean warm ischemia time was 19 (7-32) minutes, number of resections with zero ischemia was 15 (31.9 %), mean blood loss volume was 53 (10-300) mL, number of resections without renal parenchyma suturing was 10 (21.3 %). Mean hospitalization time after surgery was 5 days. Postoperative complications were observed in 4 (8.5 %) cases: bleeding (severity grade II per the Clavien-Dindo classification) in 1 (2.1 %) case, postoperative infectious complications (severity grade II) - in 2 (4.2 %) cases, subcutaneous hematoma (severity grade I) - in 1 (2.1 %) case.Conclusion. Retroperitoneoscopic access is effective and safe. This is confirmed by low frequency and severity of postoperative complications. This access allows to reduce hospitalization time and pain management medication which accelerates patient mobilization and recovery. Comparative analysis shows that retroperitoneoscopic kidney resection has the same effectiveness as laparoscopic resection.
Robot-assisted repeat resection of recurrent kidney tumors
Authors: Guliev B. G. 
Published: May 2023

Background. Currently, organ-preserving surgery of kidney tumors often involves robot-assisted access. It can also be used in partial nephrectomy in patients with local recurrence after previous resection.Aim. To evaluate the effectiveness of repeat robot-assisted partial nephrectomy of recurrent kidney tumors.Materials and methods. At the Urology Center of the Mariinsky Hospital (Saint Petersburg) between 2018 and 2022 robot-assisted partial nephrectomy was performed in 86 patients (46 (59.5 %) men and 40 (40.5 %) women) with stage Т1а (n = 72) and Tib (n = 14) kidney tumors. Mean patient age was 58.0 ± 8.5 years, tumor size varied between 1.2 and 5.2 cm. Seven (7) patients were operated on due to tumor recurrence after previously performed partial nephrectomy. In all cases, lesion was located outside the site of primary resection. Mean time between the 1st and 2nd surgeries was 24 (12-46) months. Histological examination of primary tumor showed renal cell carcinoma in 4 patients, papillary carcinoma in 2 patients, chromophobe carcinoma in 1 patient. In 5 patients, one recurrent lesion was diagnosed, in 2 patients - two. Ligation of the renal artery was performed in 2 patients, its branch - in 3, ischemia-free resection - in 2 patients. Evaluation of mean operating time, blood loss volume, warm ischemia time, pre- and postoperative kidney function was performed.Results. Mean operating time of repeat partial nephrectomy was 180 (130-210) minutes. Warm ischemia time for renal artery ligation was 16 and 20 minutes, for selective ischemia 14, 18 and 24 minutes. Mean blood loss volume was 220 (80-650) ml. No intraoperative complications were observed, grade I-II postoperative complications per the Clavien classification were observed in 2 patients. Mean decrease in glomerular filtration time was 8 % (from 62 to 54 mL/min/1.73 m2). During 16-month follow up period, tumor recurrence was not observed.Conclusion. Robotic access allows to safely and effectively perform resection of recurrent kidney tumors with satisfactory functional and intermediate oncological outcomes.
Efficacy and safety of cabozantinib in metastatic renal cell carcinoma patients: Russian multicenter observational study
Authors: Volkova M. I. , Kalpinskiy A. S. , Men'shikov K. V. , Gorbuleva L. V. , Evsyukova O. I. , Meltonyan V. R. , Mishugin S. V. , Maturov M. R. , Ol'shanskaya A. S. , Shemetov D. Yu. , Sannikova T. A. , Makhnutina M. V. , Filip'eva M. A. , Gaysina E. A. , Ovchinnikova E. G. , Matveev V. B. , Alekseev B. Ya. 
Published: May 2023

Purpose: an assessment of efficacy and safety of cabozantinib in unselected patients with metastatic renal cell carcinoma in the first and subsequent lines of therapy.Materials and methods. Russian multicenter observational study included 92 consecutive patients with morphologically verified metastatic renal cell carcinoma treated with cabozantinib (60 mg/d) in 16 Russian centers. Median age of the patients was 56 (19-79) years, a male-to-female ratio - 3:1. At the start of cabozantinib therapy 27.2 % of patients had ECOG PS 2. Most common histological type of kidney cancer was clear-cell RCC (90.2 %). Most patients were diagnosed with synchronous (71.7 %) multiple metastases (60.9 %). Previous nephrectomy was performed in 87.0 % of cases. Prognosis according to International Metastatic Renal Cancer Database Consortium (IMDC) score was assessed as favorable in 5.4 %, intermediate - in 58.7 % and poor - in 35.9 % patients. Cabozantinib as the first-line therapy was administered in 9 (9.8 %), following 1-5 lines of systemic treatment - in 83 (90.2 %) cases. Median follow-up was 11 (2.3-44.5) months.Results. In patients, receiving cabozantinib as the first-line therapy, objective response rate was 66.7 %, tumor control was reached in 100 % of cases. Median time to the objective response was 2.6 (1.9-3.6) months, median objective response duration - 13.2 (6.2-21.5) months. Median progression-free survival (PFS) and overall survival (OS) were not reached, 6- and 12-months PFS was 77.8 % and 77.8 %, 6- and 12-months OS - 88.9 % and 88.9 % respectively. Cabozantinib as the second and subsequent lines of therapy provided objective response rate of 34.9 %, tumor control rate - 97.6 %. Median time to the objective response was 2.5 (1.8-4.1) months, median objective response duration - 12.6 (5.5-27.3) months. Median PFS was not reached (6- and 12-months PFS - 92.5 % and 73.1 % respectively), median OS was 32.6 months (6- and 12-months OS - 97.4 % and 80.8 % respectively). Any adverse events (AE) developed in 88.8 %, AE grade III-IV - in 32.6 % of cases. Most frequent AE grade III-IV included arterial hypertension (18.5 %), diarrhea (6.5 %) and palmar-plantar erythrodysesthesia (6.5 %). Unacceptable toxicity demanded treatment cancellation in 2.2 %, therapy interruption - in 16.3 % and dose reduction - in 30.4 % of patients.Conclusion. Cabozantinib as the first and subsequent lines of therapy for metastatic renal cell carcinoma patients in the real world practice demonstrated high efficacy and better tolerability comparing with population assigned for cabozantinib monotherapy in the randomized phase II-III trials.
Classification urine leakage from urethrovesical anastomosis after prostatectomy
Authors: Petrosyan G. S. , Keln A. A. 
Published: May 2023

Background. Urine leakage from urethrovesical anastomosis (UVA) is a frequent and significant complication after prostatectomy.Aim. To determine frequency urine leakage from the anastomosis after prostatectomy, evaluate diagnostic methods, develop classification and management guidelines for patients with this complication.Materials and methods. A retrospective analysis of 1426 patients who underwent prostatectomy was performed. Results. In total, 97 (6.8 %) patients developed UVA failure in the early postoperative period. The complication was diagnosed on the 7th day after prostatectomy using retrograde cystography. An original classification urine leakage from the anastomosis after prostatectomy was proposed using numbers (0, I, II, III) and letters (A, B, C). In 50 (3.4 %) patients, grade I (A, B, C) UVA failure was diagnosed; 38 (2.7 %) patients had grade II (A, B, C) UVA failure; 9 (0.6 %) patients had grade III (A, B) UVA failure. The developed classification allows to accurately determine the severity of UVA failure and apply the appropriate methods for its correction.Conclusion. Urine leakage from UVA is a serious problem in surgical treatment of prostate cancer. Currently, it is necessary to systematize the available data and introduce unified classification and algorithm for correcting this complication into clinical practice.
Combined radiotherapy and hormone therapy in unfavorable intermediate risk prostate cancer
Authors: Makarova K. S. , Gumenetskaya Yu. V. , Biryukov V. A. , Rodina T. A. , Galitsyna A. B. , Shchukina E. O. , Karyakin O. B. , Ivanov S. A. , Kaprin A. D. 
Published: May 2023

Background. Currently, the group of intermediate risk prostate cancer (PC) includes 2 subgroups - favorable and unfavorable intermediate risk according to the National Comprehensive Cancer Network (NCCN) classification. The optimal scope of therapy is not defined for the unfavorable intermediate risk subgroup. In particular, the need for and duration of hormone therapy (HT) during combined radiotherapy (CRT) have not yet been determined.Aim. To perform a comparative analysis of the efficacy and toxicity of CRT in patients with unfavorable intermediate risk treated with and without HT.Materials and methods. Eighty-four (84) patients with unfavorable intermediate risk PC were treated with CRT at the clinic of the A.F. Tsyb Medical Radiological Research Center between May 2016 and December 2020. Patients were divided into two groups: external beam radiation therapy + brachytherapy (n = 40) and external beam radiation therapy + brachytherapy + HT (n = 44). Conformal external beam radiation therapy was delivered with conventional fractionation to a total dose of 44-46 Gy and the 192Ir high-dose rate brachytherapy was delivered with a single fraction of 15 Gy. Median duration of HT consisting of gonadotropin-releasing hormone agonist was 6 months. Median age was 65.2 years (range: 49-80 years). Median follow-up was 58.1 months (range: 18.6-83.7 months).Results. With a median follow-up of 4.8 years, progression-free survival was 95 % and 97.6 % in the external beam radiation therapy + brachytherapy group and external beam radiation therapy + brachytherapy + HT group, respectively (p = 0.578). The break between treatment stages of more than 28 days was associated with a statistically significant increase in the risk of PC recurrence (p = 0.007). Overall survival for the external beam radiation therapy + brachytherapy group versus external beam radiation therapy + brachytherapy + HT group was 97.5 and 93.2 % (p = 0.376), respectively.Late genitourinary toxicity was grade I in 8 (9.5 %) patients and grade II in 1 (1.2 %) patient. Urethral stricture developed in 3 (3.6 %) patients. Late gastrointestinal toxicity was grade I in 7 (8.3 %) patients and grade II in 1 (1.2 %) patient. There were no statistically significant differences in the incidence of late complications between groups with and without HT. There was a statistically significant (p = 0.049) effect of prostate volume on the incidence of late radiation proctitis.Conclusion. There were no statistically significant differences in progression-free survival and overall survival in patients with unfavorable intermediate risk PC who received external beam radiation therapy + brachytherapy with or without HT. The incidence and severity of adverse events were acceptable and allowed patients with PC to maintain high quality of life.