Research and Reports in Urology最新文献

Introduction: Ureteral stent obstruction hinders the management of malignant diseases. Adequate stent insertion through an obstructed ureter does not necessarily guarantee renal decompression and stent-related symptoms adversely affect patient comfort. There are two major problems associated with ureteral stents: obstruction and intolerance to the stents.

Case presentation: A 45-year-old woman was treated for cervical cancer with metastatic lymph nodes and ureteral obstruction with chemotherapy, radiotherapy, immunotherapy, and bilateral retrograde stenting. After recurrent stent obstruction, stent replacement was attempted more than 18 times over two years. In addition, stent-related symptoms adversely affected patient comfort. The patient was finally fitted with Superglide 8-French reinforced ureteral stents. Their replacement every six months was viewed by the patient as a relief compared to the all too frequent replacement of the previous stents. Moreover, the customized changes in the shape of Superglide stents improved patient comfort.

Discussion: Recent publications tend to indicate that large-lumen ureteral stents are most likely to remain permeable over time. Various modifications of the bladder or endo-ureteral part of double-pigtail stents have been increasingly reported, with the aim of improving their tolerance while maintaining effective drainage.

Conclusion: Adaptation of the internal lumen and shape of stents to the characteristics of the tumor and patient measurements appears to be important for increasing the drainage and tolerance of ureteral stents. The top priority for future ureteral stents suitable for malignant diseases should be to integrate these characteristics based on state-of-the-art data.

Purpose: Male stress urinary incontinence (SUI) has detrimental and long-lasting effects on patients. Management of this condition is an evolving field with multiple options for surgical treatment. We sought to review the pre-operative evaluation, intra-operative considerations, post-operative care, and future directions for treatment of male SUI.

Methods: A literature review was performed using the PubMed platform to identify peer-reviewed, English-language articles published within the last 5 years pertaining to management of male stress urinary incontinence with an emphasis on devices currently on the market in the United States including the artificial urinary sphincter (AUS), male urethral slings, and the ProACT^TM system. Patient selection criteria, success rates, and complications were compared between the studies.

Results: Twenty articles were included in the final contemporary review. Pre-operative workup most commonly included demonstration of incontinence, PPD, and cystoscopy. Definition of success varied by study; the most common definition used was social continence (0-1 pads per day). Reported rates of success were higher for the AUS than for male urethral slings (73-93% vs 70-90%, respectively). Complications for these procedures include urinary retention, erosions, infections, and device malfunction. Newer treatment options including adjustable balloon systems and adjustable slings show promise but lack long-term follow-up.

Conclusion: Patient selection remains the primary consideration for surgical decision-making for management of male SUI. The AUS continues to be the gold standard for moderate-to-severe male SUI but comes with inherent risk of need for revision. Male slings may be a superior option for appropriately selected men with mild incontinence but are inferior to the AUS for moderate and severe incontinence. Ongoing research will shed light on long-term results for newer options such as the ProACT and REMEEX systems.

Background: Online medical education is critical for public health literacy and physician efficacy, but it must be trustworthy. Although it has the potential to be a useful resource for medical education, users must be able to identify reliable content.

Objective: To assess the scientific quality of Arabic-language video content related to erectile dysfunction that is available on YouTube to learn what information our patients can handle online.

Materials and methods: A comprehensive search of the YouTube database was carried out to identify videos related to erectile dysfunction published in Arabic. The search was conducted using the following keywords: "Erectile dysfunction", "Sexual dysfunction" and "Impotence". Without a time, limit, the search was carried out until January 1, 2023. The quality assessment of the videos was done using the Kappa score.

Results: The videos in our sample had up to one million views (average 2,627,485.6), and the kappa index was 0.86 (p <0.001). Of these videos, 16% were considered scientific evidence-based (SEB), and 84% were considered not scientific evidence-based (NSEB) (p <0.001). The NSEB group addressed details concerning natural remedies, the Psychosocial sphere, and lifestyle, whereas the SEB group tended to be more concerned with physiopathology, etiology, endothelial dysfunction, diagnosis, psychosocial treatment, oral treatment, injections, or prosthesis.

Conclusion: On social media, misleading or incorrect information about erectile dysfunction is widely disseminated. This research may support urological and technical oversight and emphasizes guiding patients to the best men's health options.

Radiation-induced hemorrhagic cystitis is a refractory disease that can cause severe hematuria and bladder tamponade. Bladder tamponade due to radiation-induced hemorrhagic cystitis can often recur repeatedly and markedly reduce the quality of life. However, no blood test parameter has been studied yet regarding the prevention of bladder tamponade recurrence. An 84-year-old patient with a history of radiation therapy for cervical cancer was repeatedly hospitalized for bladder tamponade due to radiation-induced hemorrhagic cystitis. At each hospitalization, blood transfusions were performed to treat severe anemia as the first treatment, resulting in hematuria improvement, and the patient was discharged without invasive treatments such as transurethral coagulation. However, anemia developed gradually after each discharge. The anemia progression was obviously unrelated to macrohematuria because macrohematuria did not appear during that period. When the serum hemoglobin level decreased below the physiological range, bladder tamponade recurred. Based on these findings, we posited that the monitoring of the serum hemoglobin level could be useful to predict the occurrence of bladder tamponade. We hypothesized that if the serum hemoglobin level did not fall below the physiological range, bladder tamponade would not occur. We treated chronic anemia after determining its cause and kept serum hemoglobin levels within the physiological range. Since the treatment was initiated, bladder tamponade has not recurred in over 27 months. In this case, the monitoring of the serum hemoglobin level was useful to predict the occurrence of bladder tamponade due to radiation-induced hemorrhagic cystitis. By maintaining serum hemoglobin levels within the physiological range, we successfully prevented the recurrence of bladder tamponade due to radiation-induced hemorrhagic cystitis.

The 2022 global monkeypox (MPX) outbreak is the largest in history to occur outside of endemic African regions. Disease spread during this outbreak has been primarily through human-to-human transmission, with sexual contact being of particular concern. Clinical presentations have commonly featured genital, perianal, and oral lesions associated with sexual activity among men who have sex with men (MSM), who compose the vast majority of MPX cases. This review discusses the epidemiology, clinical features, and evaluation of MPX with regards to men's sexual health. Comparisons were made between MPX and its relative from the Orthopoxvirus genus, smallpox, in order to make informed inferences on the potential effects of MPX on men's sexual health. This review also discusses the role of men's health specialists and urologists in addressing the current outbreak.

Purpose: Growing evidence suggests that ischemia provokes detrusor overactivity and degenerative responses in the bladder. Underlying mechanisms appear to involve modification of smooth muscle contractile rudiments by hypoxia, redox, cellular stress and cell survival signaling. Downstream pathways of cellular stress and stress response molecules eliciting bladder dysfunction in ischemia remain largely elusive. Our goal was to define the role of double stranded RNA (dsRNA), a stress response molecule provoked by redox, in ischemia mediated bladder dysfunction.

Methods: A rat model of pelvic ischemia along with a cell culture hypoxia model were used to investigate the expression levels, functional consequences, structural aspects, and regulatory mechanisms of dsRNA in the bladder. Gene and protein expression were examined by reverse transcription polymerase chain reaction (RT-PCR), dot blot, and Western blotting, respectively. Tissue structure and function were assessed using histological staining and organ bath. Regulatory mechanisms were analyzed in cultured bladder smooth muscle cells.

Results: The data presented here provide the first evidence of the formation of dsRNA in the overactive bladder. dsRNA is a cellular stress response molecule that sensitizes smooth muscle and regulates inflammatory and degenerative rejoinders. Our data suggest that the production of dsRNA in the bladder is provoked by ischemia. Formation of dsRNA appears to augment bladder smooth muscle contractions and provoke fibrotic and apoptotic responses. Downstream actions of dsRNA in the bladder may involve upregulation of dsRNA-activated protein kinase R (PKR) and caspase-3, the executioner of apoptosis.

Conclusion: Activation of dsRNA/PKR pathway may play a role in sensitization of bladder smooth muscle cells to contractile stimuli, whereas dsRNA and caspase-3 crosstalk appear to modulate cellular stress and instigate degenerative responses in bladder ischemia. These observations suggest the role of dsRNA in bladder dysfunction and may open new perspectives to overcome overactive smooth muscle contractions and structural damage in the bladder.

Purpose: With nearly 500,000 new cases and over 150,000 deaths worldwide in 2020, renal cancers remain a significant component of the global burden of cancer. The aim of this study is to describe the clinical presentation, peri-operative condition and short-term outcome of patients operated with the primary diagnosis of renal cell carcinoma (RCC) at a large tertiary care referral center.

Patients and methods: A retrospective institution-based study was done. The study population consisted of all patients who were operated for a primary diagnosis of renal cell carcinoma from January 1st, 2015, to December 31st, 2020, at the Urology Unit of St Paul's Hospital Millennium Medical College.

Results: The final cohort consisted of 107 patients (mean (standard deviation) age 49 (±14) years, 48% male, 46% residence in Addis Ababa). The most common presenting complaint was flank pain (65%), followed by hematuria (34%) and abdominal mass (6%). One patient had the classic triad of RCC. The median (IQR) duration of illness was 9(7-11) months. Fourteen (13%) patients were asymptomatic and diagnosed incidentally. Over half (57%) of the cohort were clinical TNM stage II, with the remaining 17%, 18% and 8% being stage I, III and IV, respectively. Nearly all patients (94%) underwent open radical nephrectomy with a transabdominal approach. Most patients (61%) had no Clavien-Dindo grade complications, and a minority (11%) experienced post-operative complications (7% postoperative bleeding, 6% hospital acquired pneumonia, 3% surgical site infection). The median (IQR) length of stay was 6 (5-7.6) days. Nearly all patients (94%) were discharged and improved.

Conclusion: In this retrospective study, we have shown that patients operated for RCC are a low-risk cohort with few comorbidities, have a relatively short symptomatic course and good discharge outcome. Further prospective studies are needed to show the long-term outcome and factors associated with such outcomes in this patient population.

Introduction: Erectile dysfunction is a health problem that arises from various conditions and causes an impaired quality of life with a significant health burden. Regenerative and stem cell therapies are some of the potential treatments for erectile dysfunction. This study aimed to review the available information in the literature regarding the use of stem cells in the treatment of erectile dysfunction.

Methods: This study is a systematic review conducted based on the PubMed, Google Scholar, Cochrane, and DOAJ databases. Literature searching was conducted in English and included articles from 2000 to 2020.

Results: The result was a total of 318 articles. Following the elimination process, 9 articles remained in the final analysis. The analyzed studies included 164 patients with erectile dysfunction with various medical conditions. Several stem cell types have been used for treating erectile dysfunction, including mesenchymal stem cell, placental matrix-derived stem cell, mesenchymal stem cell-derived exosome, adipose-derived stem cell, bone marrow-derived mononuclear stem cell, and umbilical cord blood stem cell. Generally, stem cell therapy showed a good efficacy and safety profile, although not enough studies on the protocol, dosage, and mechanism of action.

Conclusion: Stem cell therapy has a good therapeutic potential in erectile dysfunction, the available data from the literature could be the base of usage of stem cells in the treatment of erectile dysfunction although need more research for broader usage.

Purpose: To evaluate the prostate cancer (PCa) detection rate in men with chronic use of Aspirin and to compare it with the detection rate of non-users.

Patients and methods: Prospectively maintained database regarding patients undergoing prostate biopsy over the last 10 years in five institutions. Patients were divided into two groups according to their exposure to Aspirin. We relied on multivariable linear and logistic regression models to test whether Aspirin administration was associated with lower PSA values at prostate biopsy, higher PCa diagnosis, and higher Gleason Grade Grouping (GGG) at biopsy.

Results: Were identified 1059 patients, of whom 803 (76%) did not take Aspirin vs 256 (24%) were taking it. In multivariable log-linear regression analysis, Aspirin administration was associated with lower PSA levels (OR 0.83, 95% CI 0.71-0.97, p = 0.01), after controlling for age, prostate volume, smoking history, associated inflammation at prostate biopsy, presence of PCa at biopsy, and GGG. In multivariable logistic regression analysis, Aspirin administration was not found to be a predictor of PCa at prostate biopsy (OR 1.40, 95% CI 0.82-2.40, p = 0.21) after controlling for age, PSA, smoking history, prostate volume, findings at digital rectal examination and the number of biopsy cores. In patients with PCa at prostate biopsy (n = 516), Aspirin administration was found to predict higher GGG (OR 2.24, 95% CI 1.01-4.87, p = 0.04).

Conclusion: Aspirin administration was found to be a predictor of more aggressive GGG. These findings suggest that a lower PSA threshold should be considered in patients taking Aspirin, as, despite low PSA levels, they might harbour aggressive PCa.

Purpose: Cystoscopy procedures can cause distress among patients. Patient perspectives on health services are essential inputs in decision-making. This study investigated the patient preferences in Spain regarding single-use cystoscopes (SUC) compared to reusable cystoscopes and their willingness to pay (WTP) for cystoscopy procedures.

Patients and methods: Between May and June 2021, an anonymous survey was distributed to Spanish patients who had previously undergone a cystoscopy. The survey included patient preference measures on reusable cystoscopes compared to SUCs and a discrete choice experiment. The survey was distributed through a human data science company (IQVIA), collected using an online survey tool (QuestionPro^®), and analyzed using Stata/MP, StataCorp.

Results: Of 300 respondents, 148 (49.33%) were female and 150 (50%) were male, and mainly between 18-49 years (247, 82.33%). Most (265, 88%) preferred to have their procedure performed with a SUC rather than a reusable cystoscope. Among these patients, 215 (80%) could imagine asking their doctor to use a SUC. A total of 231 (77%) respondents indicated an increased level of concern about the risk of exposure to contamination related to their cystoscopy following the COVID-19 pandemic. Patients would pay 62 EUR to have their initial consultation and cystoscopy procedure on the same day (p < 0.001), 59 EUR to reduce the environmental impact, and 57 EUR to reduce the risk of contamination (p < 0.001).

Conclusion: Patients prefer to undergo cystoscopy using an SUC on the same day as their initial consultation. The increased contamination concerns due to the COVID-19 pandemic and WTP to reduce the risk of cystoscope contamination may explain patients' preferences for SUCs. The most important attributes related to their cystoscopy procedure are the ability to have their procedure performed on the same day as their initial consultation, the reduction of the environmental impact, and the reduction of the contamination risk.