Browsing by Author "Acimovic, Miodrag (6508256624)"

Background and Objectives: One of the most frequent genetic alterations reported to date in prostate cancer (PC) is aberrant methylation of glutathione transferase P1 (GSTP1). Taking into consideration the involvement of oxidative stress in PC pathogenesis and recent advances in scientific understanding of the role of GSTP1*Ala114Val rs1138272 polymorphism in carcinogenesis, we hypothesized that this single-nucleotide polymorphism (SNP) influences the risk of PC independently of, or in combination with, other GST polymorphisms, including GSTP1*IIe105Val rs1695 or GSTM1 and GSTT1 deletion polymorphisms. Materials and Methods: Genotyping was performed in 237 PC cases and in 236 age-matched controls by multiplex polymerase chain reaction (PCR) for deletion of GST polymorphisms and by quantitative PCR for SNPs. Results: We found that carriers of either GSTP1*Val (rs1138272) or GSTP1*Val (rs1695) variant alleles had a PC risk compared to individuals with both referent alleles (OR = 4.93, 95%CI: 2.89–8.40, p < 0.001 and OR = 1.8, 95%CI: 1.19–2.73, p = 0.006, respectively). Additionally, in a haplotype analysis we found that individuals with GSTP1*C haplotype, represented by both variant alleles (GSTP1*Val rs1695 + GSTP1*Val rs1138272), had a 5.46 times higher risk of PC development compared to individuals with the most frequent haplotype (95%CI = 2.56–11.65, p < 0.001), suggesting a potential role of those variants in PC susceptibility. A regression analysis on the number of risk-associated alleles per individual (GSTM1*active, GSTT1*null, GSTP1*Val rs1695 and GSTP1*Val rs1138272) showed a significant increase in the risk of developing PC, from 3.65-fold in carriers of two risk alleles (95%CI = 1.55–8.61, p = 0.003) to an approximately 12-fold increase in carriers of all four risk alleles (95%CI = 3.05–44.93, p < 0.001). Conclusion: Prostate cancer may be influenced by multiple glutathione transferase (GST) polymorphic genes, especially GSTP1, highlighting the role of gene–gene interactions in human susceptibility to this cancer. © 2020 by the authors. Licensee MDPI, Basel, Switzerland.

Inflammatory myofibroblastic tumour (IMT) is a rare tumour with an intermediate biological behaviour. It usually occurs in children and adolescents, primarily in the abdomen or lungs. Histopathologically, IMT consists of spindle cells, i.e., myofibroblasts, and a variable inflammatory component. Localization in the urinary bladder is rare. We are presenting a rare case of IMT in the bladder in a middle-aged man treated by partial cystectomy. A 62-year-old man consulted a urologist because of haematuria and dysuric disturbances. A tumorous mass was detected by an ultrasound in the urinary bladder. CT urography described the tumorous mass at the dome of the urinary bladder measuring 2 × 5 cm. A smooth tumorous mass was cystoscopically observed at the dome of the urinary bladder. Transurethral resection of the bladder tumour was performed. Histopathological analysis of the specimen identified spindle cells with a mixed inflammatory infiltrate; immunohistochemical findings showed positivity for anaplastic lymphoma kinase (ALK), smooth muscle actin (SMA) and vimentin. A histopathological diagnosis of IMT was established. It was decided that the patient would undergo a partial cystectomy. A complete excision of the tumour from the dome of the urinary bladder with surrounding healthy tissue was performed. Histopathological and immunohistochemical findings of the sample confirmed the diagnosis of IMT, without the presence of the tumour at the surgical margins. The postoperative course went smoothly. IMT is a rare tumour in adults, especially localised in the urinary bladder. IMT of the urinary bladder is difficult to distinguish from urinary bladder malignancy both clinically and radiologically, as well as histopathologically. If the location and size of the tumour allow it, bladder-preserving surgeries such as partial cystectomy represent a reasonable modality of operative treatment. © 2023 by the authors.

Purpose: To assess the treatment outcome ofpTla renal tumors, comparing overall survival (OS) in patients treated with radical nephrectomy (RN) and partial nephrectomy (PN), and to examine the rate of utilization of PN in a tertiary institution in Serbia. Methods: Included were patients treated for pTla kidney tumors with open RN or open PN during 1996-2013. The inclusion criterion was the pathological tumor stage Tla. Exclusion criteria were higher pathological stages, metastatic presentation, or imperative indications for partial nephrectomy. Patients werefollowed-up every 3 to 4 months for the first year after surgery, every 6 months until the 5th year, and annually thereafter. Results: 286 patients were included in the study, and PN was performed in 177 (61.9%) of them, whereas RN was performed in the remaining 109 (38.1%). The median follow-up for the entire group was 42.0 months (interquartile range 74.5). There were no statistically significant differences between groups in cancer-specific survival (CSS) (log-rank=0.506; p=0.477). Patients selected for RN were more likely to be older, symptomatic at presentation, and have larger tumors. There was no statistically significant difference in OS between the two groups (log-rank=2.616; p=0.106). In 1996, 20% of the patients were treated with PN; this number increased to 88% in 2013. Conclusion: We did not find OS advantage for PN compared to RN in the setting of a developing country. The use of PN is increasing and is now utilized for -90% ofpTla renal tumors.

Purpose: To assess the treatment outcome ofpTla renal tumors, comparing overall survival (OS) in patients treated with radical nephrectomy (RN) and partial nephrectomy (PN), and to examine the rate of utilization of PN in a tertiary institution in Serbia. Methods: Included were patients treated for pTla kidney tumors with open RN or open PN during 1996-2013. The inclusion criterion was the pathological tumor stage Tla. Exclusion criteria were higher pathological stages, metastatic presentation, or imperative indications for partial nephrectomy. Patients werefollowed-up every 3 to 4 months for the first year after surgery, every 6 months until the 5th year, and annually thereafter. Results: 286 patients were included in the study, and PN was performed in 177 (61.9%) of them, whereas RN was performed in the remaining 109 (38.1%). The median follow-up for the entire group was 42.0 months (interquartile range 74.5). There were no statistically significant differences between groups in cancer-specific survival (CSS) (log-rank=0.506; p=0.477). Patients selected for RN were more likely to be older, symptomatic at presentation, and have larger tumors. There was no statistically significant difference in OS between the two groups (log-rank=2.616; p=0.106). In 1996, 20% of the patients were treated with PN; this number increased to 88% in 2013. Conclusion: We did not find OS advantage for PN compared to RN in the setting of a developing country. The use of PN is increasing and is now utilized for -90% ofpTla renal tumors.

In recent years, the focus of numerous studies has been the predictive value of inflammatory and nutritional parameters in oncology patients. The aim of our study was to examine the relationship between the inflammatory and nutritional parameters and the histopathological characteristics of patients with bladder cancer. A retrospective study included 491 patients who underwent radical cystectomy for bladder cancer between 2017 and 2021. We calculated the preoperative values of the neutrophil-to-lymphocyte ratio (NLR), the derived neutrophil-to-lymphocyte ratio (dNLR), the systemic immune-inflammation index (SII), the systemic inflammatory response index (SIRI), the platelet-to-lymphocyte ratio (PLR), the lymphocyte-to-monocyte ratio (LMR), the prognostic nutritional index (PNI), and the geriatric nutritional risk index (GNRI). Statistically significant positive correlations were observed between NLR, dNLR, SII, SIRI, and PLR and the pathological stage of the tumor. We observed statistically significant inverse correlations for LMR, PNI, and GNRI with the tumor stage. SIRI was identified as an independent predictor of the presence of LVI. dNLR was identified as an independent predictor of positive surgical margins. GNRI was identified as an independent predictor of the presence of metastases in the lymph nodes. We noticed the predictive value of SIRI, dNLR, and GNRI in the pathology of bladder cancer patients. © 2023 by the authors.

Purpose: To report our ongoing experience with dorsal buccal mucosa graft (BMG) urethroplasty for the primary repair of anterior urethral strictures in patients with lichen sclerosus (LS). Patients and methods: A total of 32 men with LS underwent BMG urethroplasty from January 2010 to September 2012. In 27 patients, stricture was limited to the penile urethra, while in five patients, both bulbar and penile urethra were involved. In these five patients, the entire anterior urethra was replaced with BMG. In nine (28.1 %) younger patients (mean age 38.2 years, range 33–45), with adverse local conditions and significant scarring, two-stage repair was done. The paired t test was performed on preoperative and postoperative Qmax as well as on preoperative and postoperative post-void residual urine volume, and the Fisher exact test was used to assess success between treatment groups. The chi-squared test was used to compare categorical data. Results: The overall success rate was 90.6 %. Complications occurred in 9.4 % of the patients (3 of 32) including hematoma in two patients and fistula in one patient. In this cohort of patients, mean preoperative Qmax was 6.2 ml per second (range 2.6–10.2) versus 18.2 (range 15.8–21.2) postoperatively (at 9 months), which was statistically significant (p < 0.002). Also, mean preoperative post-void residual urine volume was 110 ml (range 75–180) versus 19 ml (range 10–40) postoperatively at 9 months, which was statistically significant (p < 0.004). Conclusion: Buccal mucosa is the most reliable graft for repairing anterior urethral strictures in patients with LS. Minimal complications are observed, even in cases of long stenosis completely afflicting anterior urethra. © 2016, Springer Science+Business Media Dordrecht.

Penile fracture is a rare urological emergency caused by blunt trauma to the erect penis and it may be accompanied by urethral injury. Complete urethral rupture is very uncommon and is usually managed by primary anastomosis. However, these patients are more likely to develop post-operative complications such as urethral strictures. Buccal mucosa graft is commonly used for substitution urethroplasty in management of urethral strictures, but its use has not been reported for immediate treatment in the setting of penile fracture. We report a patient with rupture of both corpora cavernosa, as well as the rupture of the urethra, after sexual intercourse. Buccal mucosa graft was used for surgical repair of urethral injury. At 36-month follow-up patient did not experience erectile or voiding problems. The application of this technique could possibly reduce the incidence of urethral strictures in these patients and further prospective studies with larger samples should be conducted. © 2020 Elsevier Ltd

At the time when mass COVID-19 vaccination began, providing appropriate vaccination advice to uro-oncology patients became a challenge. This was a single-center cross-sectional observational study aimed to investigate the rate of COVID-19 vaccination among uro-oncology patients receiving systemic therapy for metastatic renal cell carcinoma and metastatic castration-resistant prostate cancer. Furthermore, we aimed to assess patients’ attitudes and identify factors influencing their decision to vaccinate against COVID-19. Data on patients’ sociodemographic characteristics, vaccination status, and awareness and attitudes about COVID-19 vaccination were collected from questionnaires completed by the patients. A total of 173 patients were enrolled in this study, and 124 (71.7%) of them completed the COVID-19 vaccination. Significantly higher vaccination rates were found in male patients, and also in older patients, highly educated patients, and those who lived with one household member. Furthermore, we found significantly higher vaccination rates in patients who had consulted with doctors involved in their treatment, particularly with urologists. A significant association was observed between COVID-19 vaccination and doctor’s advice, family member influence, and personal beliefs toward the vaccination. Our study showed multiple associations of patients’ sociodemographic characteristics with vaccination rates. Furthermore, consultation with doctors who are particularly involved in oncology treatment and advice received from them were associated with significantly higher vaccination rates among uro-oncology patients. © 2023 by the authors.

At the time when mass COVID-19 vaccination began, providing appropriate vaccination advice to uro-oncology patients became a challenge. This was a single-center cross-sectional observational study aimed to investigate the rate of COVID-19 vaccination among uro-oncology patients receiving systemic therapy for metastatic renal cell carcinoma and metastatic castration-resistant prostate cancer. Furthermore, we aimed to assess patients’ attitudes and identify factors influencing their decision to vaccinate against COVID-19. Data on patients’ sociodemographic characteristics, vaccination status, and awareness and attitudes about COVID-19 vaccination were collected from questionnaires completed by the patients. A total of 173 patients were enrolled in this study, and 124 (71.7%) of them completed the COVID-19 vaccination. Significantly higher vaccination rates were found in male patients, and also in older patients, highly educated patients, and those who lived with one household member. Furthermore, we found significantly higher vaccination rates in patients who had consulted with doctors involved in their treatment, particularly with urologists. A significant association was observed between COVID-19 vaccination and doctor’s advice, family member influence, and personal beliefs toward the vaccination. Our study showed multiple associations of patients’ sociodemographic characteristics with vaccination rates. Furthermore, consultation with doctors who are particularly involved in oncology treatment and advice received from them were associated with significantly higher vaccination rates among uro-oncology patients. © 2023 by the authors.

Purpose: To assess the knowledge and attitudes of men in Serbia about prostate cancer (PCA) and possibilities for its early detection and treatment in 2011. Methods: This cross-sectional study included 407 men of various ages and education levels selected randomly and divided in 2 groups according to age (up to 40 and over 40 years). The assessment of knowledge and attitudes was based on a survey made up of 12 multiple choice questions conducted with direct contact with respondents from October 15th to December 15th 2011 with their voluntary consent. The results were evaluated in the total sample and between the groups. Results: Patient groups significantly differed according to knowledge about PCA treatment success (p<0.001) and stage in which PCA is most frequently detected (p<0.001) as well as according to attitudes about community-based interventions for increasing the awareness of PCA (p<0.001). Sixty-one percent of respondents over 50 years hadn't done preventive prostate examination despite recommendations. Ninety percent of all respondents believed the community-based intervention should have been implemented in Serbia to increase the men's awareness of PCA. Conclusion: The study reported lack of men's knowledge about PCA in Serbia in 2011, while there was a common agreement among men on the necessity of spreading more information about this disease. © 2019 Zerbinis Publications. All Rights Reserved.

Purpose: To assess the knowledge and attitudes of men in Serbia about prostate cancer (PCA) and possibilities for its early detection and treatment in 2011. Methods: This cross-sectional study included 407 men of various ages and education levels selected randomly and divided in 2 groups according to age (up to 40 and over 40 years). The assessment of knowledge and attitudes was based on a survey made up of 12 multiple choice questions conducted with direct contact with respondents from October 15th to December 15th 2011 with their voluntary consent. The results were evaluated in the total sample and between the groups. Results: Patient groups significantly differed according to knowledge about PCA treatment success (p<0.001) and stage in which PCA is most frequently detected (p<0.001) as well as according to attitudes about community-based interventions for increasing the awareness of PCA (p<0.001). Sixty-one percent of respondents over 50 years hadn't done preventive prostate examination despite recommendations. Ninety percent of all respondents believed the community-based intervention should have been implemented in Serbia to increase the men's awareness of PCA. Conclusion: The study reported lack of men's knowledge about PCA in Serbia in 2011, while there was a common agreement among men on the necessity of spreading more information about this disease. © 2019 Zerbinis Publications. All Rights Reserved.

Considering the divergent biological behaviors of certain histological subtypes of urothelial carcinoma, it would be of great importance to examine the impact of variant histology and to predict its presence in patients with bladder cancer. A single-center cohort study included 459 patients who underwent radical cystectomy for urothelial carcinoma between 2017 and 2021. Patients were followed up with until July 2022. We compared clinical, laboratory, and histopathologic characteristics and the overall survival between patients with pure urothelial carcinoma and variant histologies. Our results showed that the patients with variant histology were older and preoperatively more frequently had hydronephrosis and higher values of leukocytes and neutrophils. Also, we found a significant association between variant histology and an advanced stage of tumor disease, the presence of lymphovascular invasion, positive surgical margins, and metastases in surgically resected lymph nodes. The number of neutrophils was identified as an independent preoperative predictor of the presence of variant histology after a radical cystectomy. The overall survival of the patients with variant histology was significantly lower compared to the patients with pure urothelial carcinoma. According to our results, the presence of variant histology represents a more aggressive form of the disease. Preoperative neutrophil counts may indicate the presence of variant histology of urothelial carcinoma in patients with bladder cancer. © 2023 by the authors.