Robotic-Assisted Laparoscopic Removal of Mid-Urethral Mesh Slings Eroded into the Bladder

INTRODUCTION AND OBJECTIVES

Depending on the indication, there are multiple surgical approaches for the removal of mid-urethral mesh slings (MUS): transvaginal, endoscopic, open abdominal, and robotic. We demonstrate the robotic approach to treat MUS that have eroded into the bladder. The robotic approach offers excellent exposure, visualization, and accessibility. Compared to endoscopic approaches, the entire arm of the sling can be removed from the bladder wall, the bladder repaired, and the foreign body completely eliminated. Robotic MUS excision is ideal in patients who would be best served by maximal removal of the mesh from the bladder to prevent future complications.

METHODS

In this video, we display 2 different cases showing 2 unique approaches to robotic MUS excision depending on the location of mesh erosion: 1. If a retropubic sling is eroded through the anterior bladder, we begin by dropping the bladder and entering the space of Retzius to locate the mesh arm. 2. If the sling is eroded into the posterior bladder, a cystotomy is made on the anterior dome to visualize the posterior bladder wall.

RESULTS

Once the mesh is identified, we follow the mesh graft carefully and dissect it away from surrounding tissues. The dissection is immediately close to the mesh, without fragmenting it, to allow for complete excision and protection of adjacent critical structures. The surgical principles and instrument techniques of robotic mesh excision mirror those utilized for transvaginal mesh excision. Complications of this surgical approach include a urinary leak that may require prolonged catheterization or re-operation and recurrent stress urinary incontinence, in addition to typical operative risks.

CONCLUSION

For treatment of mesh erosion into the bladder, a robotic approach offers excellent visualization, is feasible, and well-tolerated. Compared to fragmenting the mesh using an endoscopic approach, the robotic approach has the advantage of excising the mesh definitively and preventing future recurrences of mesh erosion. Properly selected patients should be offered the robotic approach to mesh excision.

Spouses Speak Up: The Impact of Mesh Sling Complications on the Patient's Spouse-A Qualitative Analysis Study

OBJECTIVE

To examine the perspectives, attitudes, and beliefs of the spouses of women with complications of mesh midurethral sling (MUS) surgery with the goal of increasing our understanding of the multidimensional nature of MUS surgery complications.

METHODS

After IRB approval, the spouses of patients who underwent surgery for MUS complications at a single tertiary care institution participated in qualitative interviews. Using an interview guide with standardized prompts, semistructured interviews were conducted. Interviews were transcribed verbatim and reviewed line-by-line by two researchers independently. Inductive content analysis was used to code the transcripts and identify themes, and consensus was achieved by the research team.

RESULTS

Seven male spouses participated in qualitative interviews, and several themes and subthemes were identified. First, spouses expressed feelings of regret. They described that their partner's dyspareunia detracted from their intimate relationship. The participants also reported the negative impact on their lives and their households. Due to the personal nature of the issue, couples would avoid involving friends and family, creating a sense of isolation. Finally, they expressed hope of finding a healthcare team experienced with mesh complications and invested in their spouse's improvement.

CONCLUSION

Spouses of women who experience MUS complications serve as caregivers and provide support; they are impacted by adverse outcomes. It is important to acknowledge their role in patients' healthcare experiences and learn from their insights. Our study lays the foundation for future work and ultimately for improving the experiences of patients and their spouses with MUS surgery and potential complications.

Wealth of Knowledge and Passion: Patient Perspectives on Vaginal Estrogen as Expressed on Reddit

OBJECTIVE

To qualitatively analyze the knowledge, attitudes, and beliefs of women regarding genitourinary syndrome of menopause (GSM) and vaginal estrogen therapy as expressed on Reddit, a public, anonymous internet forum for discussion and information sharing.

METHODS

"r/menopause," a Subreddit with >30,000 subscribers, was queried for "vaginal estrogen" to collect postings related to vaginal estrogen in October 2022. Posts were analyzed qualitatively by 2 independent researchers. The principles of grounded theory were applied, and preliminary themes were generated. These themes were used to derive emergent concepts.

RESULTS

Sixty-seven unique posts with 1101 responses were analyzed. Qualitative analysis revealed 5 preliminary themes: (1) questions regarding medication usage, (2) medication side effects, (3) medication alternatives, (4) frustration with the medical system, and (5) seeking validation for symptoms and experiences. Three emergent concepts were derived: (1) women experience bothersome side effects from menopause, and they desire compassionate and effective medical treatment; (2) women are engaged and active participants in their health and health care decisions; and (3) women perceive that their concerns are not taken seriously and seek validation for their medical conditions.

CONCLUSION

Peri- and post-menopausal women have many questions and concerns about the condition of GSM and vaginal estrogen as treatment. They also have a broad range of frustrations including access to health care and questions about the usage of vaginal estrogen. By better understanding patient perspectives, physicians can better meet women's needs and improve care for GSM.

Female pelvic medicine and reconstructive surgery fellows' case logs remained stable during the COVID-19 pandemic

INTRODUCTION

During the COVID-19 pandemic and subsequent staffing shortages there was concern about the case volume, and thus competency, of graduating trainees due to reduced surgical volumes. Elective procedures were particularly affected, which includes Female Pelvic Medicine and Reconstructive Surgery (FPMRS) cases. To understand whether FPMRS fellows were affected, we assessed their case logs for changes during the pandemic.

METHODS

The nationally aggregated case logs of graduating FPMRS fellows, both urology and obstetrics and gynecology (OBGYN), were obtained from the Accreditation Council for Graduate Medical Education. The available academic years (AYs) included 2018-2019, 2019-2020, and 2020-2021. Standard deviation for each index category was derived from the average and 90th percentile data. One-way analysis of variance was used to compare differences in case volumes for tracked index categories between AYs.

RESULTS

Graduating fellows logged an average of 517.4 (standard deviation [SD] 28.6) and 818.0 (SD 37.9) cases, for urology and OBGYN respectively, over their fellowship training during the examined period. No significant differences in total surgical procedures were found for either specialty between pre-COVID AY 2018-2019 and COVID-affected AYs 2019-2020 and 2020-2021. For urology fellows, gastrointestinal (GI) procedures was the only index case category with a significant difference, and it was a decrease between the two COVID-affected AYs: 2020-2021 compared to 2019-2020 (8.9 vs. 4.2, p = 0.04). For both urology and OBGYN fellows, there was a statistically significant decrease in graft/mesh augmentation procedures from COVID-affected AY 2019-2020 to AY 2020-2021. This may be attributed to the reclassification of mesh removal cases from graft/mesh augmentation procedures to genital procedures in 2020-2021. There was not a significant decrease in these procedures from pre-COVID AY 2018-2019 to the COVID-affected AYs. There were no other statistically significant differences between AYs for OBGYN fellows.

CONCLUSIONS

Surgical case volumes for FPMRS urology and OBGYN fellows who trained during the COVID-19 pandemic were comparable to those of their pre-pandemic peers. No significant differences between pre-COVID and COVID-affected years were found for either total surgical procedures or index case categories. Despite disruptions in health care nationwide, FPMRS trainee case volumes were largely unaffected.

Rationale and design of an implant procedure and pivotal study to evaluate safety and effectiveness of Medtronic's tibial neuromodulation device

Percutaneous tibial neuromodulation is a medical guideline recommended therapy for treating symptoms of overactive bladder. Stimulation is delivered to the tibial nerve via a thin needle placed percutaneously for 30 min once a week for 12-weeks, and monthly thereafter. Studies have shown that this therapy can effectively relieve symptoms of overactive bladder; however, the frequent office visits present a barrier to patients and can impact therapy effectiveness. To mitigate the burden of frequent clinic visits, small implantable devices are being developed to deliver tibial neuromodulation. These devices are implanted during a single minimally invasive procedure and deliver stimulation intermittently, similar to percutaneous tibial neuromodulation. Here, we describe the implant procedure and design of a pivotal study evaluating the safety and effectiveness for an implantable tibial neuromodulation device. The Evaluation of Implantable Tibial Neuromodulation (TITAN 2) pivotal study is a prospective, multicenter, investigational device exemption study being conducted at up to 30 sites in the United States and enrolling subjects with symptoms of overactive bladder.

"Vagina" Is Not a Bad Word: Historical and Contemporary Censorship of the Word "Vagina"

OBJECTIVE

To characterize instances of censorship of the word "vagina" to better understand perceptions and behaviors surrounding the word.

METHODS

Internet and relevant database (PubMed, Academic OneFile, Proquest, Health Business Elite, etc) searches were conducted for the words "vagina," "censor," and related wildcard terms. Search results were filtered by three independent reviewers for relevance. Related articles were summarized and reviewed for common themes. In addition, interviews were conducted with three people who have personal experience with censorship of the word "vagina." Interviews were transcribed and also reviewed for common themes.

RESULTS

Examples of censorship of the word "vagina" were compiled, and several themes were identified: (1) Policies surrounding censorship are unclear; (2) Policies appear highly variable; (3) There are differing standards between references to male and female genitalia; and (4) Objections often call the use of "vagina" overtly sexual, profane, or unprofessional.

CONCLUSION

The word "vagina" is censored across multiple platforms and policies regarding censorship are inconsistent and unclear. Pervasive censorship of the word "vagina" perpetuates a culture of ignorance and shame about women's bodies. Until we normalize the word "vagina," we cannot make progress on women's pelvic health.

Evidence-based review of nonantibiotic urinary tract infection prevention strategies for women: a patient-centered approach

PURPOSE OF REVIEW

There is a growing interest in nonantibiotic prevention strategies for recurrent urinary tract infections (rUTIs). Our objective is to provide a focused, pragmatic review of the latest evidence.

RECENT FINDINGS

Vaginal estrogen is well tolerated and effective for preventing rUTI in postmenopausal women. Cranberry supplements at sufficient doses are effective in preventing uncomplicated rUTI. Methenamine, d -mannose, and increased hydration all have evidence to support their use, although the evidence is of somewhat variable quality.

SUMMARY

There is sufficient evidence to recommend vaginal estrogen and cranberry as first-line rUTI prevention strategies, particularly in postmenopausal women. Prevention strategies can be used in series or in tandem, based on patient preference and tolerance for side effects, to create effective nonantibiotic rUTI prevention strategies.

Creating an Extraordinary Experience for Women Undergoing Cystoscopy: A Patient-Centered Approach to Process Improvement

OBJECTIVE

To re-examine and improve the cystoscopy process for women based on patient input. While cystoscopy is a common urological procedure, women perceive it as invasive, personal, and fear-inducing. Patients want to be treated as individuals and not just another "procedure."

METHODS

Women's perspectives on cystoscopy were collected using experience-based design. Observations and timings, emotion word lists, debrief forms, patient surveys, simulation, and interviews were used. A structured 2-day quality improvement event included both in-person and virtual patient participation to gain a deeper understanding of patients' perspectives. Ideas for process improvements were generated using brainstorming, creativity exercises, and prioritization. These changes were implemented and refined using an iterative process based on feedback.

RESULTS

Patients who reported feeling grateful for the positive impact of their care tended to minimize procedure-associated wait times, inconvenience, and discomfort. Women in the evaluation phase of their treatment and those who were unhappy with their symptoms tended to magnify the negative emotions associated with their procedure. Patient feedback and areas for improvement specific to women's needs were identified. Actionable changes were implemented including engaging clinic staff, updating the cystoscopy workflow, and physical changes to enhance patient privacy.

CONCLUSION

Identifying and addressing the needs of women undergoing cystoscopy improves satisfaction as their emotional, physical, and knowledge-based needs are addressed. Active participation in the health care process empowers patients to have a voice in their care. An extraordinary experience with cystoscopy may decrease anxiety of the unknown and help patients have control over the experience.

Opioid-Limiting Pain Control After Transurethral Resection of the Prostate: A Randomized Controlled Trial

OBJECTIVE

To assess whether a multimodal opioid-limiting protocol and patient education intervention can reduce postoperative opioid use following transurethral resection of the prostate.

METHODS

This prospective, non-blinded, single-institution, randomized controlled trial (NCT04102566) assigned 50 patients undergoing a transurethral resection of the prostate to either a standard of care control (SOC) or multimodal experimental group (MMG). The intervention included adding ibuprofen to the postoperative pain regimen, promoting appropriate opioid use while hospitalized, an educational intervention, and discharging without opioid prescription. Data regarding demographics, operative data, opioid use, pain scores, and patient satisfaction were compared.

RESULTS

A total of 47 patients were included, n = 23 (MMG) and n = 24 (SOC). Demographic and operative findings were similar. Statistical analysis for noninferiority demonstrated non-inferior inpatient pain control (mean pain score 2.5 MMG vs 2.4 SOC, P = 0.0003). The multimodal group used significantly fewer morphine milligram equivalents after discharge (0 vs 4.1, P = 0.04). Inpatient use was reduced but did not reach statistical significance (6.0 vs 9.8, P = 0.2). Mean satisfaction scores with pain control were similar (9.6 MMG vs 9.2 SOC, P = 0.32). No opioid prescriptions were requested after discharge. Adverse events and medication side effects were infrequent and largely similar between groups.

CONCLUSION

Implementation of an opioid-limiting postoperative pain protocol and patient education resulted in no outpatient opioid use while maintaining patient satisfaction with pain control. Eliminating opioids following a common urologic procedure will decrease risk of opioid-related adverse events and have a positive downstream impact.

Examination of Information and Misinformation about Urinary Tract Infections on TikTok and YouTube

OBJECTIVE

To describe and assess the quality and accuracy of the most highly viewed YouTube and TikTok posts related to urinary tract infections (UTIs). Social media is increasingly a resource for health information. YouTube and TikTok videos are highly utilized and are potentially a source of helpful information or misinformation.

METHODS

During January 2021, "UTI" was searched within YouTube and TikTok and the most relevant videos were identified and analyzed for their content. Accuracy of scientific information, possible misinformation, and credibility of the videos was rated independently by three reviewers. Posts were categorized as educational/informational, shared experience, humor/entertainment, and home remedies/alternative therapies.

RESULTS AND CONCLUSIONS

In 50 YouTube and 50 TikTok videos respectively, the median number of views was 49K and 1.4M, the median number of likes was 296 and 58K, and the median number of comments was 50 and 616. The proportion of female to male presenters was equal for YouTube videos while 94% of those from TikTok were female. Overall, YouTube videos had higher median scores for scientific information, credibility, and less misinformation compared to TikTok. YouTube videos with more views, likes, and comments tended to have lower scores in all categories and more misinformation. More presenters were medical professionals on YouTube videos than those on TikTok. While videos from both platforms contained misinformation, none promoted misinformation that would cause harm to health. Healthcare providers should be aware of the potential influence of social media as patients are getting health information from many sources.

Effect of COVID-19 on Graduating Urology Resident Case Logs: Analysis of the Accreditation Council of Graduate Medical Education National Data Reports

OBJECTIVE

To assess the national case logs of the first graduating urologic resident cohorts to have trained during the COVID-19 pandemic for effects on surgical volumes.

METHODS

The nationally aggregated Accreditation Council for Graduate Medical Education urology resident case logs were obtained for graduates of academic years (AYs) 2015-2016 through 2020-2021. Case volume differences for tracked index categories were compared between AYs with a 1-way analysis of variance. Data were then combined into pre-COVID and COVID-affected resident cohorts and differences in average cases logged were analyzed with 2-tailed student's t-tests.

RESULTS

Graduating urology residents logged an average of 1322 (SD 24.8) cases over their residency during the examined period. Total cases had multiple statistical differences between AYs but the only index category with a statistically significant decrease for a COVID-affected AY compared to pre-COVID AY was pediatric majors: AY 2020-2021 logged fewer cases than AY 2015-2016 (53.9 vs 63.0, P = .004) and AY 2018-2019 (53.9 vs 61.2, P = .04). When aggregated into pre- and COVID-affected cohorts, both pediatric minor (123.4 vs 117.5, P = .049) and pediatric major (61.4 vs 56.8, P = .003) case averages decreased for the COVID-affected cohort of residents, but no adult index category decreased.

CONCLUSION

National graduating urology resident surgical volume for adult index categories was maintained through the pandemic. Pediatric cases saw a statistical decrease in volume of questionable clinical significance. This does not eliminate concern that individuals may have experienced a detrimental impact on their resident education.

Incomplete bladder emptying and urinary tract infections after botulinum toxin injection for overactive bladder: Multi-institutional collaboration from the SUFU research network

INTRODUCTION

Onabotulinumtoxin A (BTX-A) is an effective therapy for overactive bladder (OAB), however, adverse events may prevent patients from initiating therapy. The study objective was to report real-world rates of incomplete emptying and urinary tract infection (UTI) in men and women undergoing BTX-A for OAB.

METHODS

Eleven clinical sites performed a retrospective study of adults undergoing first-time BTX-A injection (100 units) for idiopathic OAB in 2016. Exclusions included: postvoid residual (PVR) > 150 ml, prior BTX-A, pelvic radiation, or need for preprocedure catheterization. Primary outcomes at 6 months were incomplete emptying (clean intermittent catheterization [CIC] or PVR ≥ 300 ml without the need for CIC); and UTI (symptoms with either positive culture or urinalysis or empiric treatment). We compared rates of incomplete emptying and UTI within and between sexes, using univariate and multivariable models.

RESULTS

278 patients (48 men and 230 women) met inclusion criteria. Mean age was 65.5 years (range: 24-95). 35% of men and 17% of women had incomplete emptying. Men had 2.4 (95% CI: 1.04-5.49) higher odds of incomplete emptying than women. 17% of men and 23.5% of women had ≥1 UTI, the majority of which occurred within the first month following injection. The strongest predictor of UTI was a history of prior UTI (OR: 4.2 [95% CI: 1.7-10.3]).

CONCLUSIONS

In this multicenter retrospective study, rates of incomplete emptying and UTI were higher than many previously published studies. Men were at particular risk for incomplete emptying. Prior UTI was the primary risk factor for postprocedure UTI.

The extracellular matrix molecules versican and hyaluronan in urethral and vaginal tissues in stress urinary incontinence

PURPOSE

Abnormal extracellular matrix (ECM) changes are correlated with stress urinary incontinence (SUI). The ECM components versican (Vcan) and hyaluronan (HA) play key roles in regulating tissue inflammation and maintaining connective tissue homeostasis. We analyzed the localization and expression of these ECM components in urethral and vaginal tissues from a rat model of urinary incontinence and from human clinical specimens.

METHODS

Nulliparous rats underwent vaginal distension (VD), a rodent model of SUI, or a sham procedure. Tissues were harvested from six rats per group at days 1, 4, and 21 for immunohistochemistry and RNA expression analysis of ECM components. Periurethral vaginal samples from female patients with SUI were also examined.

RESULTS

High-intensity staining for Vcan was observed 1 day after procedure in both control and VD animals. This level of abundance persisted at day 4 in VD compared to control, with concurrent reduced messenger RNA (mRNA) expression of the Vcan-degrading enzymes ADAMTS5 and ADAMTS9 and reduced staining for the Vcan cleavage epitope DPEAAE. Abundance of HA was not different between VD and control, however mRNA expression of the HA synthase Has2 was significantly reduced in VD tissues at day 4. Abundant Vcan staining was observed in 60% of SUI patient samples, which was strongest in regions of disrupted elastin.

CONCLUSION

Reduction of Vcan-degrading enzymes and HA synthases at day 4 postsurgery indicates a potential delay in ECM turnover associated with SUI. Abundant Vcan is associated with inflammation and elastin fiber network disruption, warranting further investigation to determine its role in SUI pathogenesis.

National Trends in Neuromodulation for Urinary Incontinence Among Insured Adult Women and Men, 2004-2013: The Urologic Diseases in America Project

OBJECTIVE

To examine US trends in neuromodulation for urinary incontinence (UI) treatment from 2004 to 2013.

METHODS

This study utilized 2 data sources: the Optum© de-identified Clinformatics® Data Mart Database for privately insured adults aged 18-64 years with a UI diagnosis (N≈40,000 women and men annually) and the Medicare 5% Sample for beneficiaries aged ≥65 years with a UI diagnosis (N≈65,000 women and men annually). We created annual cross-sectional cohorts and assessed prevalence of UI-related neuromodulation procedures among men and women separately from 2004 to 2013. Analyses were conducted overall and stratified by age, race/ethnicity, and geographic region.

RESULTS

Nearly all neuromodulation procedures occurred in outpatient settings. Sacral neuromodulation (SNM) procedures for UI in both women and men grew steadily from 2004 to 2013, with more procedures performed in women than men. Among women with UI, SNM prevalence grew from 0.1%-0.2% in 2004 to 0.5%-0.6% in 2013. Posterior tibial nerve stimulation (PTNS) experienced growth from 2011 to 2013. Chemodenervation of the bladder with onabotulinumtoxinA (BTX) combined with other injectable procedures (including urethral bulking) remained stable over time.

CONCLUSIONS

From 2004 to 2013, SNM procedures remained relatively uncommon but increased consistently. PTNS experienced growth starting in 2011 when PTNS-specific insurance claims became available. BTX trends remain unclear; future studies should assess it separately from other injectable procedures. Neuromodulation has a growing role in UI treatment, and ongoing trends will be important to examine.

Listening to Women: A Qualitative Analysis of Experiences after Complications from Mesh Mid-urethral Sling Surgery

OBJECTIVE

To gain a detailed understanding of women's experiences after undergoing revision surgery for mesh mid-urethral sling (MUS) complications, qualitatively organize those experiences, and present insights as potential springboards for future research.

METHODS

We conducted a series of semistructured focus groups and interviews of patients who had undergone mesh MUS revision surgery at a single tertiary referral institution. Discussions were recorded, transcribed, de-identified, and analyzed using deductive and inductive content analysis. Two researchers independently performed line-by-line coding and 2 additional researchers reviewed the codes and transcripts as an audit.

RESULTS

Nineteen women participated in the study. Complications from mesh MUS surgery impacted participants psychologically, socially, sexually, and physically. Participants recounted that risks and alternatives to MUS surgery were understated during the informed consent process whereas benefits were overstated. Participants shared insights into negative and positive ways surgeons responded to postoperative complications and how their experiences impacted the patient-surgeon relationship.

CONCLUSION

The impact of complications from mesh MUS surgery is broad and can involve multiple domains of a woman's life. Improved pre-operative patient preparedness, empathetic response toward patients who present with complications, prompt referral to surgeons with experience in mesh MUS complications and multidisciplinary care will likely improve the patient experience and can serve as foci for future studies.

Treatment of urethral stricture disease in women: A multi‐institutional collaborative project from the SUFU research network

AIM

Female urethral stricture disease is rare and has several surgical approaches including endoscopic dilations (ENDO), urethroplasty with local vaginal tissue flap (ULT) or urethroplasty with free graft (UFG). This study aims to describe the contemporary management of female urethral stricture disease and to evaluate the outcomes of these three surgical approaches.

METHODS

This is a multi-institutional, retrospective cohort study evaluating operative treatment for female urethral stricture. Surgeries were grouped into three categories: ENDO, ULT, and UFG. Time from surgery to stricture recurrence by surgery type was analyzed using a Kaplan-Meier time to event analysis. To adjust for confounders, a Cox proportional hazard model was fit for time to stricture recurrence.

RESULTS

Two-hundred and ten patients met the inclusion criteria across 23 sites. Overall, 64% (n = 115/180) of women remained recurrence free at median follow-up of 14.6 months (IQR, 3-37). In unadjusted analysis, recurrence-free rates differed between surgery categories with 68% ENDO, 77% UFG and 83% ULT patients being recurrence free at 12 months. In the Cox model, recurrence rates also differed between surgery categories; women undergoing ULT and UFG having had 66% and 49% less risk of recurrence, respectively, compared to those undergoing ENDO. When comparing ULT to UFG directly, there was no significant difference of recurrence.

CONCLUSION

This retrospective multi-institutional study of female urethral stricture demonstrates that patients undergoing endoscopic management have a higher risk of recurrence compared to those undergoing either urethroplasty with local flap or free graft.

Tobacco use, immunosuppressive, chronic pain, and psychiatric conditions are prevalent in women with symptomatic mesh complications undergoing mesh removal surgery

Purpose

To identify demographic and clinical characteristics of patients with symptomatic pelvic floor mesh complications who underwent mesh removal at our academic medical center. The secondary goal was to determine patient-reported outcomes after mesh removal.

Materials and Methods

We conducted a retrospective review of consecutive patients from 2011-2016 undergoing removal of mesh graft for treatment of symptomatic mesh-related complications. Patient demographics, comorbidities, symptoms, and mesh factors were evaluated. Outcomes after explant were determined by the Patient Global Impression of Improvement and a Likert satisfaction scale.

Results

One hundred fifty-six symptomatic patients underwent complete or partial pelvic floor mesh removal during the study period. Mid-urethral slings comprised 86% of explanted mesh grafts. Mesh exposure or erosion was identified in 72% of patients. Eighty-one percent of patients presented with pain, and 35% reported pain in the absence of exposure or erosion. Pre-operative comorbidities included psychiatric disease (54.5%), chronic pain (34.0%), irritable bowel syndrome (20.5%) and fibromyalgia (9.6%). Forty-three percent of patients reported current or past tobacco use. At mean follow-up of 14 months, 68% of responding patients reported improvement on the Patient Global Impression of Improvement after surgery.

Conclusions

This research identified tobacco use, and psychiatric, immunosuppressive, and chronic pain conditions as prevalent in this cohort of patients undergoing mesh removal. Surgical removal can improve presenting symptoms, including for patients with pain in the absence of other indications.

The Impact of Frailty on Artificial Urinary Sphincter Placement and Removal Procedures

OBJECTIVE

To determine whether frailty is associated with increased odds of 30-day surgical complications among men undergoing both artificial urinary sphincter (AUS) placement and removal procedures and to determine whether frailty was associated with increased odds of having an AUS removal procedure.

METHODS

This is a retrospective cohort study of men undergoing AUS placement and removal procedures using data from the American College of Surgeons National Surgical Quality Improvement Program (ACS-NSQIP) from 2006 to 2013. Frailty was quantified using the NSQIP-FI (frailty index) and was applied to logistic regression models predicting 30-day complications (overall, major, and minor) and the odds of having an AUS removal procedure (over an AUS placement procedure).

RESULTS

We identified a total of 624 and 147 men undergoing AUS placement and removal procedures, respectively. NSQIP-FI of ≥0.27, but not age, was associated with major complications (aOR 3.5, 95% confidence interval 1.2-9.9), while age ≥85 years, but not NSQIP-FI, was associated with minor complications (aOR 7.9, 95% confidence interval 1.4-45.6). Men undergoing AUS removal procedures tended to be more frail compared to men undergoing AUS placement procedures (12.9% vs 6.1% had NSQIP-FI of ≥0.27, P<.01).

CONCLUSION

Men undergoing AUS removal procedures are, on average, more frail compared to men undergoing AUS placement procedures. Frailty is associated with increased odds of major complications and with having an AUS removal procedure. These findings highlight the importance of incorporating measures of frailty, instead of age alone, into the perioperative decision-making process for adults considering these types of procedures.

Practice patterns in the diagnosis and treatment of fecal incontinence with sacral neuromodulation: Can urologists impact this gap in care?

OBJECTIVE

The prevalence of fecal incontinence (FI) is 8% in the United States. Many patients will not seek treatment and the condition is underdiagnosed. Sacral neuromodulation (SNM) is effective in treating FI, and so urologists can play a key role in its treatment. We examine the practice patterns and treatment of FI with SNM in our institution.

MATERIAL AND METHODS

The electronic medical record was queried for the proportion of patients seen for FI in the institution, the urology department, and among the female pelvic medicine and reconstructive surgery (FPMRS) urologists. The patients who underwent SNM for FI were evaluated for progression to second stage procedure.

RESULTS

The proportion of patients seen for FI is 0.96% in the institution as a whole, 7.9% in the urology department, and 17.9% among FPMRS urologists. Fourteen patients underwent first stage SNM for FI or dual urinary/fecal incontinence, and they all progressed to a second stage procedure. Thirteen of these were performed by FPMRS urologists.

CONCLUSION

In our institution, the proportion of patients seen for FI was lower than the prevalence of this condition. Because patients with urinary incontinence are more likely to have FI, urologists are in a unique position to identify these patients and offer treatment that can improve their quality of life. We acknowledge a gap in care of the patients with FI and an opportunity for urologists to help patients with this devastating yet treatable condition.

Analysis of the Completely Dry Rate Over Time After Mid-urethral Sling in a Real-world Clinical Setting

OBJECTIVE

To improve patient counseling regarding mid-urethral slings (MUS), we performed an analysis of MUS patients dry at initial follow-up to evaluate probability of remaining dry over time, and analyzed clinical factors potentially influencing the probability of remaining dry.

METHODS

A retrospective review of our prospectively-collected institutional database identified patients who underwent retropubic MUS (RMUS) or transobturator MUS (TMUS) between January 2001 and March 2016 and were completely dry, defined as an answer of "not at all" to UDI-6 question 3, at first follow-up within 1.5 years of surgery. Proportion remaining dry over time was estimated by Kaplan-Meier. Associated factors were evaluated using Cox proportional hazards modeling. Proportion with urge urinary incontinence at time of sling failure was assessed.

RESULTS

Of 1102 patients undergoing MUS, 38.4% returned questionnaires and 47.5% of these were completely dry at initial follow-up (139 RMUS, 62 TMUS). Probability (95% CI, n = total patients) of remaining dry after RMUS at 3, 5, and 10 years was 72% (64%-81%, n = 70), 60% (51%-70%, n = 51), and 26% (18%-43%, n = 17). Probability estimates for TMUS at 3 and 5 years were 74% (62%-88%, n = 27) and 50% (35%-70%, n = 14). Obesity (Hazard ratio 2.22, P = .003) and age (Hazard ratio 1.043, P < .001) were associated with lower probability of remaining dry after RMUS. Of patients no longer completely dry at last follow-up, 72% RMUS and 75% TMUS had urge urinary incontinence.

CONCLUSION

In our real-world cohort, patients who are dry within the first 1.5 years following MUS have ≥50% chance of remaining dry for 4 more years.

Inconsistency in the Definition of Urinary Tract Infection after Intravesical Botulinum Toxin A Injection: A Systematic Review

PURPOSE

To more accurately examine the rate of urinary tract infection following onabotulinumtoxinA injection of the bladder we systematically reviewed the literature for definitions of urinary tract infection in studies of onabotulinumtoxinA injections. We assessed the studies for consistency with guideline statements defining urinary tract infections.

MATERIALS AND METHODS

We systematically reviewed the literature by querying MEDLINE® and Embase®. We included original studies on adult patients with idiopathic overactive bladder and/or neurogenic detrusor overactivity who underwent cystoscopy with onabotulinumtoxinA injection and in whom urinary tract infection was a reported outcome.

RESULTS

We identified 299 publications, of which 50 met study inclusion criteria. In 27 studies (54%) urinary tract infection diagnostic criteria were defined with a total of 10 definitions among these studies. None of the overactive bladder studies used a definition which met the EAU (European Association of Urology) criteria for urinary tract infection. Only 2 of the 10 studies on patients with neurogenic bladder used a urinary tract infection definition consistent with the NIDRR (National Institute on Disability and Rehabilitation Research) standards.

CONCLUSIONS

Definitions of urinary tract infection are heterogeneous and frequently absent in the literature on onabotulinumtoxinA to treat overactive bladder and/or neurogenic bladder. Given the potential for post-procedure urinary symptoms in this setting, explicit criteria are imperative to establish the true urinary tract infection rate following treatment with onabotulinumtoxinA.

Evolution of the Ureteral Stent: The Pivotal Role of the Gibbons Ureteral Catheter

OBJECTIVE

To review the pioneering contributions of Dr. Robert Gibbons of Virginia Mason Medical Center to the evolution and development of the modern ureteral stent.

METHODS

We reviewed Dr. Gibbons' extensive work through primary sources, including interviews, projector slides, radiology images, stent prototypes, his personal writings, and archived documents. In addition, we performed a review of historical texts and manuscripts describing important innovations in the development of the ureteral stent.

RESULTS

In 1972, motivated by a desire to provide his patients with a long-term alternative to open nephrostomy and inspired by Drs. David Davis and Paul Zimskind, who in 1967 had described the use of indwelling ureteral silicone tubing, Dr. Gibbons began to experiment with modifications to improve upon existing stents. To address distal migration, Dr. Gibbons added "wings" that collapsed as the stent was advanced and expanded once in proper position to secure the stent in place. Barium was embedded into the proximal tip to facilitate radiographic visualization. A flange was added to the distal end, preventing proximal migration and minimizing trigonal irritation, and a tail was attached to aid in stent removal. The result was the original Gibbons stent, the first commercially available ureteral stent, and the establishment of Current Procedural Terminology code 52332, still used today.

CONCLUSION

The ureteral stent is a fundamental component of urologic practice. In developing the Gibbons stent, Dr. Gibbons played a pivotal role in addressing the challenge of internal urinary diversion particularly for those who needed long-term management. Urologists and the patients they serve owe Dr. Gibbons and other surgeon-inventors a debt of gratitude for their innovative work.

Use of Third Line Therapy for Overactive Bladder in a Practice with Multiple Subspecialty Providers-Are We Doing Enough?

PURPOSE

Overactive bladder impacts more than 15% of the adult population. Compliance with medical treatment is low due to inadequate symptom control or intolerable side effects. Although third line therapies have improved the treatment of overactive bladder, many patients do not receive optimal treatment. We hypothesized that third line treatment use is higher among female pelvic medicine and reconstructive surgery urologists, and we examined its use at our tertiary referral center.

MATERIALS AND METHODS

The electronic medical record was queried for patients with overactive bladder seen in 1 year. The number of visits associated with an overactive bladder prescription and the number of patients who received third line therapy were determined and subcategorized by department. Female pelvic medicine and reconstructive surgery providers were considered separately.

RESULTS

A total of 5,445 patients (8,994 visits) were seen for overactive bladder. Of all patients seen for overactive bladder 3.5% received third line therapy compared with 10.0% and 14.1% of those seen by urology providers and female pelvic medicine and reconstructive surgery providers, respectively.

CONCLUSIONS

The use of third line therapy was reported to be less than 5%. This rate is higher at our institution, which is likely due to multiple female pelvic medicine and reconstructive surgery providers. We also apply an algorithm that facilitates patient education on available options should first and second line treatments fail. Given the limited compliance with medical treatment for overactive bladder, we are likely missing a segment of the patient population who would benefit from third line treatment. Our data demonstrate an opportunity for urologists to improve the quality of overactive bladder treatment and subsequently improve patient quality of life.

The Glt1 glutamate receptor mediates the establishment and perpetuation of chronic visceral pain in an animal model of stress-induced bladder hyperalgesia

Psychological stress exacerbates interstitial cystitis/bladder pain syndrome (IC/BPS), a lower urinary tract pain disorder characterized by increased urinary frequency and bladder pain. Glutamate (Glu) is the primary excitatory neurotransmitter modulating nociceptive networks. Glt1, an astrocytic transporter responsible for Glu clearance, is critical in pain signaling termination. We sought to examine the role of Glt1 in stress-induced bladder hyperalgesia and urinary frequency. In a model of stress-induced bladder hyperalgesia with high construct validity to human IC/BPS, female Wistar-Kyoto (WKY) rats were subjected to 10-day water avoidance stress (WAS). Referred hyperalgesia and tactile allodynia were assessed after WAS with von Frey filaments. After behavioral testing, we assessed Glt1 expression in the spinal cord by immunoblotting. We also examined the influence of dihydrokainate (DHK) and ceftriaxone (CTX), which downregulate and upregulate Glt1, respectively, on pain development. Rats exposed to WAS demonstrated increased voiding frequency, increased colonic motility, anxiety-like behaviors, and enhanced visceral hyperalgesia and tactile allodynia. This behavioral phenotype correlated with decreases in spinal Glt1 expression. Exogenous Glt1 downregulation by DHK resulted in hyperalgesia similar to that following WAS. Exogenous Glt1 upregulation via intraperitoneal CTX injection inhibited the development of and reversed preexisting pain and voiding dysfunction induced by WAS. Repeated psychological stress results in voiding dysfunction and hyperalgesia that correlate with altered central nervous system glutamate processing. Manipulation of Glu handling altered the allodynia developing after psychological stress, implicating Glu neurotransmission in the pathophysiology of bladder hyperalgesia in the WAS model of IC/BPS.

MRI suggests increased tonicity of the levator ani in women with interstitial cystitis/bladder pain syndrome

INTRODUCTION AND HYPOTHESIS

In interstitial cystitis/bladder pain syndrome (IC/BPS), pelvic floor dysfunction may contribute significantly to pelvic pain. To determine if pelvic floor hypertonicity manifests alterations on magnetic resonance imaging (MRI) in patients with IC/BPS, we retrospectively compared pelvic measurements between patients and controls.

METHODS

Fifteen women with IC/BPS and 15 age-matched controls underwent pelvic MRI. Two blinded radiologists measured the pelvic musculature, including the H- and M lines, vaginal length, urethral length and cross-sectional area, levator width and length, and posterior puborectalis angle. MRI measures and clinical factors, such as age, parity, and duration of symptoms, were compared using a paired, two-tailed t test.

RESULTS

There were no significant differences in age, parity, or symptom duration between groups. Patients with IC/BPS exhibited shorter levator muscles (right: 5.0 ± 0.7 vs. 5.6 ± 0.8, left: 5.0 ± 0.8 vs. 5.7 ± 0.8 cm, P < 0.002) and a wider posterior puborectalis angle (35.0 ± 8.6 vs. 26.7 ± 7.9°, P < 0.01) compared with controls. The H line was shorter in patients with IC/BPS (7.8 ± 0.8 vs. 8.6 ± 0.9 cm, P < 0.02), while M line did not differ. Total urethral length was similar, but vaginal cuff and bladder neck distances to the H line were longer in patients with IC/BPS (5.7 ± 0.6 vs. 5.1 ± 0.9 cm, P < 0.02; 1.9 ± 0.4 vs. 1.4 ± 0.2 cm, P < 0.001, respectively).

CONCLUSIONS

Patients with IC/BPS have pelvic floor hypertonicity on MRI, which manifests as shortened levator, increased posterior puborectalis angles, and decreased puborectal distances. We identified evidence of pelvic floor hypertonicity in patients with IC/BPS, which may contribute to or amplify pelvic pain. Future studies are necessary to determine the MRI utility in understanding pelvic floor hypertonicity in patients with IC/BPS.

National Practice Patterns of Infection Prophylaxis for Sacral Neuromodulation Device: A Survey of High Volume Providers

INTRODUCTION

Sacral neuromodulation using the InterStim® device is a safe, effective treatment for urgency, frequency, urgency incontinence, nonobstructive urinary retention and fecal incontinence. However, there is no standard recommendation regarding infection prophylaxis. Therefore, we surveyed the infection prophylaxis patterns of high volume device providers to describe current practice patterns of perioperative infection prophylaxis.

METHODS

A web based survey was sent to 35 high volume providers, including urologists, gynecologists and colorectal surgeons.

RESULTS

Our response rate was 89% (31 of 35 participants). Of the providers 51% were urologists, 39% were gynecologists and 10% were colorectal surgeons. Of the respondents 74% had performed more than 200 procedures and 22% had done more than 500. The testing period was generally 1 to 2 weeks. Only 13% of the surveyed providers routinely screened for methicillin resistant Staphylococcus aureus. All providers administered antibiotics preoperatively, most commonly cefazolin or vancomycin, and 81% administered antibiotics postoperatively, most commonly cephalexin and trimethoprim-sulfamethoxazole. Most providers prescribed 5 to 7 days of treatment but 6 (19%) prescribed no postoperative antibiotics. In addition, 71% of respondents used adjunctive measures, frequently intraoperative wound irrigation and/or a preoperative chlorhexidine shower. After stages 1 and 2, 19% of providers prohibited showering for more than 3 days postoperatively while 61% permitted showering after 1 or 2 days and 19% recommended no bathing restriction.

CONCLUSIONS

We present the infection prevention practices of high volume InterStim sacral neuromodulation device implanters in the United States. Further study is warranted to guide evidence-based practice in InterStim infection prophylaxis.

Outcomes of Sacral Neuromodulation for Overactive Bladder in Octogenarian Females

PURPOSE

Elderly women have a high incidence of refractory overactive bladder. Clinicians and elderly patients may be hesitant to consider sacral neuromodulation. We investigated outcomes of sacral neuromodulation in women 80 years old or older.

MATERIALS AND METHODS

From 2000 to 2013, 24 octogenarians with overactive bladder underwent stage 1 implantation of the InterStim® sacral neuromodulation device. We defined stage 1 success as 50% or greater improvement in incontinence episodes and/or pads. Those patients underwent placement of an implantable pulse generator. The primary study outcome was the rate of stage 1 success. Secondary outcomes were the complication rate and patient reported improvement/satisfaction.

RESULTS

We identified 24 octogenarians with a median age of 85 years (range 80 to 89), of whom 18 (75%) experienced stage 1 success. At a mean 17-month followup (range 1 to 59) success was sustained in 13 patients (72%) and 15 (83%) were medication free. Two patients (12%) experienced complications, including urinary tract infection in 1 and pain at the implantable pulse generator site in 1, which resolved within 1 month. Three patients (17%) underwent lead revision and 2 subsequently regained success. Five of the 10 patients (50%) who returned the PGI-I questionnaire reported that their condition was very much or much improved, 3 felt a little improved and 2 reported no change. The self-reported satisfaction rate was 60%.

CONCLUSIONS

Octogenarian women treated with sacral neuromodulation had a high rate of stage 1 success with no major complications. Most of them reported improvement and satisfaction at a mean followup of 17 months. Advanced age alone should not preclude consideration of sacral neuromodulation as a treatment option for overactive bladder in the properly selected elderly patient.

Chronic psychological stress in high-anxiety rats induces sustained bladder hyperalgesia

OBJECTIVE

To evaluate whether anxiety-prone rats exposed to chronic water avoidance stress (WAS) develop visceral bladder hyperalgesia in addition to increased voiding frequency and anxiety-related behaviors.

MATERIALS AND METHODS

Female Wistar-Kyoto (WKY) rats were exposed to chronic (10-day) WAS or sham paradigms. Referred hyperalgesia and tactile allodynia were tested using von Frey filaments applied to the suprapubic region and plantar region of the hindpaw, respectively. To confirm that suprapubic nociception represented referred visceral bladder hyperalgesia, we recorded abdominal visceromotor responses (VMR) to slow (100 μl/min) and fast (1 cc/sec) bladder filling with room temperature or ice-cold saline. We assessed the development of hyperalgesia over the 10-day WAS protocol and the durability of increased pain sensations over time.

RESULTS

Animals exposed to chronic WAS had significantly lower hindpaw withdrawal thresholds post-stress and significant differences in referred hyperalgesia. Rats exposed to chronic WAS demonstrated an increased pain response to suprapubic stimulation and decreased response threshold to mechanical hindpaw stimulation by day 8 of the stress protocol, which persisted for more than one month. Animals exposed to chronic WAS showed increased VMR to fast filling and ice water testing in comparison to sham animals. Cystometry under anesthesia did not show increases in the frequency of non-voiding contractions.

CONCLUSION

Chronic WAS induces sustained bladder hyperalgesia, lasting over a month after exposure to stress. The urinary frequency demonstrated previously in anxiety-prone rats exposed to chronic WAS seems to be associated with bladder hyperalgesia, suggesting that this is a potential model for future studies of bladder hypersensitivity syndromes such as interstitial cystitis/painful bladder syndrome (IC/PBS).

Generalized seizure activity in an adult rhesus macaque (Macaca mulatta) during ketamine anesthesia and urodynamic studies

We report a case of a generalized seizure in an adult female rhesus macaque ( Macaca mulatta) undergoing a urodynamic evaluation while she was anesthetized with continuous-infusion ketamine. The seizure presented with generalized tonic-clonic activity during bladder infusion with saline. The tonic-clonic phase was self-limited and was followed by focal facial twitching, which was interrupted by bolus administration of intravenous diazepam. The ictal event was documented as pressure oscillations during cystometrogram recordings and a period of external urethral sphincter muscle activation, which was detectable by electromyography. An acute decrease in urethral pressure was demonstrated at the end of the generalized seizures. Ketamine anesthesia combined with relatively rapid infusion of saline into the bladder may have contributed to the onset of seizures. In addition, this case highlights the value of having a fast-acting benzodiazepine agent available to stop continuous or residual seizure activity during diagnostic or experimental procedures in anesthetized nonhuman primates.

Defining and managing overactive bladder: disagreement among the experts

OBJECTIVE

To better understand experts' perceptions of the definition of overactive bladder (OAB) and the evaluation and treatment of OAB in women.

MATERIALS AND METHODS

OAB has been defined by the International Continence Society as "urinary urgency, with or without urge urinary incontinence, usually with frequency and nocturia." Under the current definition, people with very different clinical conditions are included under the OAB umbrella. In the present study, 12 interviews with leading urologic, gynecologic, and geriatric practitioners in urinary incontinence and OAB were performed. Questions were asked about their perception and agreement with the current definition of OAB. The interviews were audiotaped and transcribed verbatim. The grounded theory method was used to analyze the data.

RESULTS

Overall, a great amount of variability was found in the definition and management of OAB. Four categories of definitions were derived from the qualitative analysis: the current OAB definition is adequate, OAB is a constellation of symptoms, OAB should include the fear of leakage, and OAB is a marketing term. Although some consensus has been reached on the evaluation, several areas have demonstrated disagreement over elements of the evaluation. Experts also believed that OAB is a chronic condition, with symptom variability, and has no cure. Managing patient expectations is essential, because OAB is challenging to treat. A focus was placed on behavioral therapy.

CONCLUSION

The experts disagreed over the definition and workup of OAB. However, the experts agreed that OAB is a chronic condition with a low likelihood of cure.

Laparoscopic partial nephrectomy for completely intraparenchymal tumors

PURPOSE

Management for intraparenchymal renal tumors represents a technical challenge during laparoscopic partial nephrectomy since, unlike exophytic tumors, there are no external visual cues on the renal surface to guide tumor localization or excision. Also, hemostatic renorrhaphy and pelvicalyceal suture repair in these completely intrarenal tumors create additional challenges. We examined the safety and technical feasibility of this procedure in this cohort.

MATERIALS AND METHODS

Of 800 patients who underwent laparoscopic partial nephrectomy 55 (6.9%) had completely intraparenchymal tumors. Technical steps included intraoperative ultrasound guidance of tumor resection, en bloc hilar clamping, cold excision of tumor and sutured renal reconstruction.

RESULTS

Mean tumor size was 2.3 cm (range 1.0 to 4.5), mean blood loss was 236 cc (range 25 to 1,000) and mean warm ischemia time was 29.9 minutes (range 7 to 57). There were no positive margins. When we compared laparoscopic partial nephrectomy for intraparenchymal tumors to the same procedure in another 3 tumor groups, including completely exophytic tumors, tumors infiltrating up to sinus fat and tumors infiltrating but not up to sinus fat, there were no statistically significant differences among the groups in complications, positive margin rate, blood loss, or tumor excision or warm ischemia time.

CONCLUSIONS

Laparoscopic partial nephrectomy for completely intrarenal tumors is a technically advanced but effective, safe procedure. Facility and experience with the technique, effective use of intracorporeal laparoscopic ultrasound and adherence to sound surgical principles are the keys to success. Most recently we have performed laparoscopic and robotic partial nephrectomy for such completely intrarenal tumors using a zero ischemia technique.

Sexual development and fertility of Loxl1-/- male mice

Our objective was to investigate the genitourinary defects and fertility of the male lysyl oxidase-like 1 gene (Loxl1) knockout (Loxl1(-/-)) mouse, with particular attention to fecundity and testicular, epididymal, gubernacular, and penile histopathology, which may lead us to a better understanding of the role of the elastin-homeostasis gene, LOXL1, in male sexual development. Genital morphometric evaluation of 6- to 9-month-old male Loxl1(-/-) mice (n = 26) was compared with C57Bl/6 controls (n = 24). Measurements included: body weight, scrotal development, evidence of feminization (nipples or vaginal pouch), penile malformations, anogenital distance, and absence/presence and size of perineal bulge. Sperm production was estimated using a standardized technique. A breeding program was conducted to determine how much of the infertility observed in Loxl1(-/-) pairs was due to the male factor. Finally, we performed histopathologic comparison of the genitourinary organs of Loxl1(-/-) and control mice. Loxl1(-/-) mice weighed less than their age-matched C57Bl/6 counterparts (P < .001). Size-adjusted perineal bulge was larger (P < .001), and resting location of the gonads was higher intra-abdominally (P = .048) in the Loxl1(-/-) mice. Estimates of daily sperm counts revealed that the Loxl1(-/-) mice had lower sperm production (P = .048). Loxl1(-/-) males bred with control females demonstrated relative fecundity values intermediate between Loxl1(-/-) pairs (lowest fecundity) and control pairs (highest fecundity), suggesting a component of male-factor infertility. No histologic differences were noted using hematoxylin-eosin or specialized elastin staining of the gonads, gubernaculum, and penis. Although further studies are warranted, these findings suggest a subtle and likely multifactorial role of the LOXL1 protein in male sexual development and fertility.

Incidence of prostate cancer in male breast cancer patients: a risk factor for prostate cancer screening

Synchronous or metachronous occurrences of both prostate cancer and male breast cancer are rarely reported, but provide insight into their hormonal and genetic biology. We sought to determine the incidence of prostate cancer in male breast cancer patients at our institution, and to examine estrogen receptor (ER), progesterone receptor (PR) and HER-2/neu receptor (HR) status in these patients. A retrospective review was conducted of male breast cancer patients from 1990 to 2006. Histopathologic characteristics and hormone receptor expression was obtained. In 69 patients with male breast cancer, 12 (17%) also had a diagnosis of prostate cancer. Nine had ER-positive status and three were unreported. PR status was positive in 5, whereas 3 had PR-negative status. HR status was positive in 1, whereas 5 had HR-negative status. Male breast cancer patients in this cohort have an incidence of prostate cancer higher than would be predicted in the general population; this risk factor has implications for careful prostate cancer screening.

Lower urogenital tract anatomical and functional phenotype in lysyl oxidase like-1 knockout mice resembles female pelvic floor dysfunction in humans

Female pelvic floor dysfunction (FPFD) is a complex group of conditions that include urinary incontinence and pelvic organ prolapse (POP). In humans, elastin homeostasis has been implicated in the pathophysiology of FPFD. Lysyl oxidase-like 1 knockout (LOXL1-KO) mice demonstrate abnormal elastic fiber homeostasis and develop FPFD after parturition. We compared the lower urogenital tract (LUT) anatomy and function in LOXL1-KO mice with and without POP. LUT anatomy was assessed in LOXL1-KO mice over 28 wk. Pelvic visceral anatomy in LOXL1-KO was evaluated with a 7-Tesla magnetic resonance imaging (MRI) scanner. LUT function was assessed using conscious cystometry and leak point pressure (LPP) testing. Quantitative histological analysis of elastic fibers was performed on external urethral sphincter (EUS) cross sections. By 25 wk of age, 50% of parous LOXL1-KO mice developed POP. LOXL1-KO mice with POP had greater variability in the size and location of the bladder on MRI compared with mice without POP. Parity and POP were associated with lower LPP. Elastin clusters were significantly increased in the EUS of LOXL1-KO mice with POP. Because parity triggers POP in LOXL1-KO mice, LOXL1-KO mice with POP have variable internal pelvic anatomy, and both parity and POP are associated with a decrease in LPP, we conclude that LOXL1 LUT anatomical and functional phenotype resembles FPFD in humans. The increase in elastin clusters in the urethra of LOXL1-KO mice with POP suggests that elastin disorganization may lead to functional abnormalities. We conclude that LOXL1 warrants further investigation in the pathphysiology of FPFD.

A pilot study on accelerated sludge degradation by a high-concentration membrane bioreactor coupled with sludge pretreatment

A new sludge treatment process combining a high MLSS membrane bioreactor with sludge pretreatment techniques was studied in pilot-scale experiments. The membrane bioreactor (MBR) was adopted for high efficiency aerobic digestion. The combination of alkaline-ozone treatment of the mixed liquor in the MBR reactor accelerated the biodegradation process by enhancing biodegradability of the sludge. The hydraulic retention time (HRT) of the reactor was set as 3.1 days and the DO level was 1 mg/L on average. After 5 months of operation, the accumulative total solids reduction was more than 70%. Removal efficiency of volatile solids and non-volatile solids were 76% and 54%, respectively. It was found that a considerable portion of the non-volatile solids was dissolved into ions and then flushed out with the effluent. Also, about 41% and 28% of T-N and T-P in the raw sludge were removed although no biological nutrient removal process was adopted. The experiment was run smoothly without significant membrane fouling, even at the relatively high levels of MLSS concentration (11,000-25,000 mg/L). It is concluded that the newly proposed process can significantly increase the sludge reduction efficiency with much shorter retention times.