Cystic Renal Masses: Old and New Paradigms

Cystic renal masses describe a spectrum of lesions with benign and/or malignant features. Cystic renal masses are most often identified incidentally with the Bosniak classification system stratifying their malignant potential. Solid enhancing components most often represent clear cell renal cell carcinoma yet display an indolent natural history relative to pure solid renal masses. This has led to an increased adoption of active surveillance as a management strategy in those who are poor surgical candidates. This article provides a contemporary overview of historical and emerging clinical paradigms in the diagnosis and management of this distinct clinical entity.

Hospitalization following pediatric kidney transplantation: An international comparison among a Canadian pediatric transplant center, North American Pediatric Renal Trials and Collaborative Studies, and Cooperative European Pediatric Renal Transplant Initiative registry data

BACKGROUND

There are several databases across the world that collect pediatric KT data. We compare the hospitalization outcomes for pediatric KT recipients from a large Canadian transplant center (SickKids database; The Hospital for Sick Children Kidney Transplantation Institutional Database), United States (NAPRTCS), and Europe (CERTAIN registry).

METHODS

An institutional retrospective review of KT was performed between 2000 and 2015. Baseline characteristics, duration of initial hospitalization/readmission at 1-5 and 6- to 11-month posttransplant, and 1-year graft survival data were collected. Corresponding data from the NAPRTCS 2014 Annual Transplant Report and CERTAIN registry were compared.

RESULTS

Posttransplant, patients from NAPRTCS had the shortest duration of hospitalization within the first month (10.4 days, SE 0.2), followed by SickKids (20.3 days, SE 0.7) and CERTAIN (25.5 days, SE 0.7). For both living and deceased donor populations, patients from SickKids were most likely to be hospitalized at 1- to 5-month posttransplant (82.4% [89/108]; 72.1% [98/136]), followed by Europe (52.1% [198/380]; 61.6% [501/813]) and United States (45.4% [2379/5241]; 51.4% [2517/4896]). Patients from Europe were most likely to be hospitalized at 6- to 12-month posttransplant (42.1% [160/380]; 51.7% [420/813]), followed by SickKids (35.2% [38/108]; 37.5% [51/136]) and United States (28.3% [1387/4901]; 31.6% [1411/4465]). Across all databases, the most commonly addressed issues during readmissions were infectious complications.

CONCLUSION

The differences observed in this investigation may reflect the local reimbursement models, resources for outpatient management, and practice variations across a large Canadian transplant center, United States, and European countries.

The who, what, and how of teamwork research in medical operating rooms: A scoping review

Despite the importance of teamwork in the operating room (OR), teamwork can often be conflated with teamwork components (e.g., communication, cooperation). We reviewed the existing literature pertaining to OR teamwork to understand which teamwork components have been assessed. Following PRISMA guidelines for scoping reviews, 4,233 peer-reviewed studies were identified using MEDLINE and Embase. Eighty-seven studies were included for synthesis and analysis. Using the episodic model of teamwork as an organizing framework, studies were grouped into the following teamwork categories: (a) transition processes (e.g., goal specification), (b) action processes (e.g., coordination), (c) interpersonal processes (e.g., conflict management), (d) emergent states (e.g., psychological safety), or (e) omnibus topics (a combination of higher-order teamwork processes). Results demonstrated that action processes were most frequently explored, followed by transition processes, omnibus topics, emergent states, and interpersonal processes. Although all studies were framed as investigations of teamwork, it is important to highlight that most explored only one or a few constructs under the overarching umbrella of teamwork. We advocate for enhanced specificity with descriptions of OR teamwork, reporting practices pertaining to interprofessional demographics and outcomes, and increased diversity in study design and surgery type to advance understanding of teamwork and its implications.

Incidence of dural metastases in castrate-resistant prostate cancer

Purpose:

The natural history and clinical manifestations of dural metastases (DM) in castrate-resistant prostate cancer (CRPC) will change with advances in new hormonal therapy. Here, we characterised the incidence, clinical presentation, and outcomes of patients with DM in a contemporary patient cohort with CRPC.

Methods:

We retrospectively reviewed our CRPC database from 2012 to 2020. The primary outcome was the diagnosis of DM, defined as metastasis to the dura mater in the brain or spine. We describe the presenting symptoms, biochemistry, radiologic findings, and therapy sequence for all DM patients. Multivariable logistic regression was performed to identify predictors of DM.

Results:

Six of the 275 patients (2.2%) with CRPC developed DM. The average age of CRPC diagnosis for patients with DM was 65.6 years. Mean patient survival was 4.5 months after the diagnosis of DM. At the time of CRPC diagnosis, patients who developed DM were significantly younger, had lower baseline haemoglobin, higher lactate dehydrogenase (LDH), and elevated alkaline phosphatase (ALP) compared to those without DM. On multivariable analysis, younger age of CRPC diagnosis was found to be a predictor for DM.

Conclusion:

The presence of neurological symptoms in the context of younger age, anaemia, and elevated baseline LDH and ALP are associated with DM in CRPC.

Level of Evidence:

4

Trends in maternal mortality in India over two decades in nationally representative surveys

OBJECTIVE

To assess national and regional trends and causes-specific distribution of maternal mortality in India.

DESIGN

Nationally representative cross-sectional surveys.

SETTING

All of India from 1997 to 2020.

SAMPLE

About 10 000 maternal deaths among 4.3 million live births over two decades.

METHODS

We analysed trends in the maternal mortality ratio (MMR) from 1997 through 2020, estimated absolute maternal deaths and examined the causes of maternal death using nationally representative data sources. We partitioned female deaths (aged 15-49 years) and live birth totals, based on the 2001-2014 Million Death Study to United Nations (UN) demographic totals for the country.

MAIN OUTCOME MEASURES

Maternal mortality burden and distribution of causes.

RESULTS

The MMR declined in India by about 70% from 398/100 000 live births (95% CI 378-417) in 1997-98 to 99/100 000 (90-108) in 2020. About 1.30 million (95% CI 1.26-1.35 million) maternal deaths occurred between 1997 and 2020, with about 23 800 (95% CI 21 700-26 000) in 2020, with most occurring in poorer states (63%) and among women aged 20-29 years (58%). The MMRs for Assam (215), Uttar Pradesh/Uttarakhand (192) and Madhya Pradesh/Chhattisgarh (170) were highest, surpassing India's 2016-2018 estimate of 113 (95% CI 103-123). After adjustment for education and other variables, the risks of maternal death were highest in rural and tribal areas of north-eastern and northern states. The leading causes of maternal death were obstetric haemorrhage (47%; higher in poorer states), pregnancy-related infection (12%) and hypertensive disorders of pregnancy (7%).

CONCLUSIONS

India could achieve the UN 2030 MMR goals if the average rate of reduction is maintained. However, without further intervention, the poorer states will not.

TWEETABLE ABSTRACT

We estimated that 1.3 million Indian women died from maternal causes over the last two decades. Although maternal mortality rates have fallen by 70% overall, the poorer states lag behind.

Integrative review and evaluation of quality of life related instruments in pediatric urology

INTRODUCTION

While most paediatric urologists consider patients' quality of life (QOL) important, few actually measure this outcome. Our goal was to assess instruments used in the pediatric urology QOL literature, specifically looking at whether they captured QOL.

METHODS

We searched MEDLINE and EMBASE for articles with a self-described primary outcome of measuring QOL. All validated QOL instruments in the papers were analyzed by QOL instrument content experts. Instruments were classified as focusing on: Functioning or QOL (Table). The term Functioning focuses on performing activities. QOL captures person's perceptions about their position in life, informed by circumstances, functioning and conditions. QOL instruments were further subdivided into generic QOL, health-related QOL (HRQOL) and disease-specific HRQOL. Only direct patient self-reported QOL instruments were then assessed, since they are the most clinically useful, reliably assessing patients' own perception of their QOL.

RESULTS

Forty-three publications met inclusion criteria (published 1999-2019). Most common conditions included urinary incontinence (16, 37.2%) and kidney transplantation (12, 27.9%). Overall, 22 unique instruments purporting to measure QOL were identified. Looking at the concepts measured by each instrument, nine instruments (40.9%) assessed Functioning. Nine instruments (40.9%) measured a combination of Functioning and QOL. Only the remaining 4 instruments (18.2%) assessed strictly QOL. The 13 instruments assessing any QOL focused on generic QOL (n = 4), HRQOL (n = 3) and disease-specific HRQOL (n = 6). Of the subset of four instruments assessing strictly QOL, and not Functioning, all had patient self-reported versions available: two generic QOL instruments (KINDL, KIDSCREEN), one generic HRQOL (DISABKIDS), and one disease-specific HRQOL (QUALAS). Thirteen of 43 studies (30.2%) employed more than one instrument. Thirty-eight studies (88.4%) used an instrument measuring Functioning, with 19 (44.1%) measuring only Functioning, not QOL at all. Twenty-four studies (55.8%) used an instrument measuring actual QOL, although 17 (39.5%) used a combined Functioning/QOL instrument. Only nine (20.9%) used a strictly QOL instrument (strictly HRQOL instruments: 4.7%).

DISCUSSION

We present encouraging evidence of sustained interest in QOL research in pediatric urology and identify areas needing improvement. Selecting appropriate QOL tools requires a working knowledge of their various underlying meanings and purposes. Whether it adequately assess QOL must be considered. We discuss strengths and weaknesses of instruments and a practical approach to QOL instrument selection.

CONCLUSION

Much of pediatric urology is grounded in improving QOL. Unfortunately, most studies published to date focus on Functioning, rather than young people's perception-based QOL. Future QOL studies should ideally employ validated instruments capturing patient-reported QOL.

Utility of pre-transplant lower urinary tract investigation in pediatric renal transplant population after referral: A 16-year institutional experience

To evaluate the clinical utility of pre-renal transplant LUT investigations in pediatric populations after their referral for transplant evaluation based on the etiology of their ESRD. A 16 year retrospective review of patients undergoing RT performed at our institution was performed. Patients were stratified into two groups: Group 1-non-urologic and Group 2-urologic etiology for ESRD. Baseline characteristics, pre-transplant LUT investigations, and urologic interventions were assessed. One-year clinical outcomes were compared between those with and without LUT investigations following referral for renal transplantation (RT). 227 patients and 97 patients were identified for Groups 1 and 2, respectively. 19% of Group 1 and 73% of Group 2 had VCUG, while 1% and 13%, respectively, had UDS ordered following referral for RT. In both groups, >50% of VCUG and UDS were ordered without specific clinical concerns. These had low likelihood of prompting interventions, both pre-transplant (Group 1-VCUG 0%, UDS 0%; Group 2-VCUG 0%, UDS 8%) or post-transplant (Group 1-0%, Group 2-5%). In both groups, LUT investigation following referral for RT did not lead to differences in 1 year outcomes assessed. In anticipation of pediatric RT, LUT investigations ordered without clinical indications did not provide information that altered management prior to transplantation.

The role of bariatric surgery on kidney transplantation: A systematic review and meta-analysis

INTRODUCTION

Obesity (body mass index [BMI] >35 kg/m²) remains a relative contraindication for kidney transplant, while patients after kidney transplantation (KTX) are predisposed to obesity. The present study aims to investigate the role of bariatric surgery in improving transplant candidacy in patients prior to KTX, as well its safety and efficacy in KTX patients postoperatively.

METHODS

A systematic search was conducted up to March 2020. Both comparative and non-comparative studies investigating the role of bariatric surgery before or after KTX were considered. Outcomes included change in BMI, rates of mortality and complications, and the rate of patients who underwent KTX following bariatric surgery. Pooled estimates were calculated using the random effects meta-analysis of proportions.

RESULTS

Twenty-one studies were eligible for final review; 11 studies investigated the role of bariatric surgery before KTX. The weighted mean BMI was 43.4 (5.7) kg/m² at baseline and 33.9 (6.3) kg/m² at 29.1 months followup. After bariatric surgery, 83% (95% confidence interval [CI] 57-99) were successfully listed for KTX and 83% (95% CI 65-97) patients subsequently received successful KTX. Ten studies investigated the role of bariatric surgery after kidney transplant. Weighted mean baseline BMI was 43.8 (2.2) kg/m² and mean BMI at 19.5 months followup was 34.2 (6.7) kg/m². Overall, all-cause 30-day mortality was 0.5% for both those who underwent bariatric surgery before or after receiving a KTX. The results of this study are limited by the inclusion of only non-randomized studies, limited followup, and high heterogeneity.

CONCLUSIONS

Bariatric surgery may be safe and effective in reducing weight to improve KTX candidacy in patients with severe obesity and can also be used safely following KTX.

Fostering trust, collaboration, and a culture of continuous quality improvement: A call for transparency in medical school accreditation

Medical schools provide the foundation for a physician's growth and lifelong learning. They also require a large share of government resources. As such, they should seek opportunities to maintain trust from the public, their students, faculty, universities, regulatory colleges, and each other. The accreditation of medical schools attempts to assure stakeholders that the educational process conforms to appropriate standards and thus can be trusted. However, accreditation processes are poorly understood and the basis for accrediting authorities' decisions are often opaque. We propose that increasing transparency in accreditation could enhance trust in the institutions that produce society's physicians. While public reporting of accreditation results has been established in other jurisdictions, such as Australia and the United Kingdom, North American accrediting bodies have not yet embraced this more transparent approach. Public reporting can enhance public trust and engagement, hold medical schools accountable for continuous quality improvement, and can catalyze a culture of collaboration within the broader medical education ecosystem. Inviting patients and the public to peer into one of the most formative and fundamental parts of their physicians' professional training is a powerful tool for stakeholder and public engagement that the North American medical education community at large has yet to use.

Pediatric Kidney Transplant Experience in Ontario: A Review of Division of the Surgical and Medical Management Across Local Tertiary Care Institutions

Background:

Our institution is the largest pediatric kidney transplantation (KT) center in Canada and the referral center for pediatric KT in Ontario. Pediatric KT recipients are referred to our center for KT and transferred back to their local tertiary care institutions for post-transplant care. This investigation assesses whether the current system of transferring patients back to their local tertiary care institutions following KT allows decreased burden and distribution of resources from a single centralized surgical center.

Methods:

A retrospective review of KT performed at our institution between 2000 and 2015 was performed. Patients were divided into those who began their chronic kidney disease (CKD) care at our institution and those who began their care elsewhere. Readmission to our institution within 1 year of KT for surgical and nonsurgical complications was compared. The geographical proximity of patients to our institution and institution of initial CKD care was assessed quantitatively and mapped visually.

Results:

Of 324 patients who underwent KT, 244 (75.3%) began their CKD care at our institution. Those who began their CKD care at other institutions had shorter initial admissions to our institution (17 [14-24] vs 14 [12-17], P < .0001) and were less likely to be readmitted to our institution for nonsurgical concerns at <6 months after transplant (P < .0001) and 6 to 12 months after transplant (P < .0001). There were similar readmissions for complications requiring surgical management. The relationship between the center of CKD initiation and readmission remained significant on multivariate analysis. There was a significant difference in distance (km) to our institution between the 2 groups (46 [interquartile range = 24-109] vs 203 [117-406], P < .0001).

Conclusion:

Patients who are geographically distanced from our institution began their CKD care at their closest institution and were managed effectively at those institutions following initial discharge/transfer of care, suggesting that there is an effective distribution of health care resources with regard to CKD and KT care.

Initial clinical experience with simple orchiectomy procedures in the context of transition-related surgeries

Background : One of the more common procedures conducted through the transition-related surgeries (TRSs) program is simple orchiectomy. Due to the relative novelty of TRS in Canada, national perioperative guidelines for simple orchiectomy in the context of TRS are yet to be developed. Furthermore, there is a void in the literature describing the indications and outcomes of simple orchiectomy among transgender individuals. Aims : This study is the first descriptive case series in Canada highlighting our experience with simple orchiectomy in the context of TRS. Methods : This study retrospectively assessed data from electronic patient medical records of 16 patients who had simple orchiectomy procedures at Women's College Hospital in Toronto, Canada from August 2018 to April 2019. Data were collected using a standardized data collection form which includes patient baseline demographic data, and objective and subjective clinical outcomes. Results : Mean age at surgery was 32.6 ± 10.4 years and mean time to surgery following the initial approval of referral was 9.9 ± 8.5 weeks. A majority of referrals (n = 13, 81.3%) were from urban areas with specialized TRS services. The average time on hormones was 3.1 ± 1.9 years. In terms of post-surgical complications at the 30-day day follow-up visit, there was a single post-operative sperm granuloma reported. There were no other complications identified post-surgery in our patient case series. Discussion : In Ontario, the growing recognition of the benefits of TRS has led to the development of a publicly funded pathway to TRS surgery. This study is the first assessment of simple orchiectomy performed for TRS in Canada, and it has shown that the procedure is safe and reproducible. Due to its benefits, coordinating safe and efficient access of care for this procedure should be an important action item for health systems. This study is limited by its low sample size.

Assessment of Needs in Children Suffering From Refractory Non-neurogenic Urinary and Fecal Incontinence and Their Caregivers' Needs and Attitudes Toward Alternative Therapies (SNM, TENS)

Background: Non-neurogenic urinary and fecal incontinence (UI, FI) affects approximately 6% of North American children with 1% of cases becoming refractory (nonresponsive to standard therapies). Incontinence has major potential long-term physiological and psychological implications for patients and their families. While Sacral Neuromodulation (SNM) and Transcutaneous Nerve Stimulation (TENS) are alternative therapies available for the treatment of refractory UI/FI, these are not approved for use in children in Canada. The present study assessed participants' perception of current treatments, incontinence burden, and attitudes toward novel therapies in a single pediatric institution. Methods: Multiple validated questionnaires including Dysfunctional Voiding Scoring System (DVSS), Bristol Stool Chart (BSC), Pediatric Incontinence measurement (PinQ), and Time-Driven Activity Based Costing were used to perform a needs assessment for patients with non-neurogenic refractory incontinence, and to determine patients' and caregivers' attitudes toward alternative therapies. Results: 75% of patients and 89% of caregivers reported a moderate to severe impact of incontinence on QoL with diminished social interactions among the primary concerns. Caregivers were frustrated with current treatments and were open to trying alternative therapies (SNM and TENS), which, at least in the case of SNM, seems to be less expensive, possibly less burdensome and more effective than current surgical options. Conclusion: Pediatric refractory UI/FI has a large impact on patients' and caregivers' QoL and alternative therapies with the potential to improve QoL of patients and caregivers should be further investigated as a substitute for surgery.

Developing a Value-Based Approach to Outcome Reporting in Pediatric Surgery

The population that undergoes pediatric surgical procedures in high-resource settings such as Canada primarily comprises healthy patients who undergo low-risk, elective surgeries and fewer higher-risk patients who require more complex surgeries. Given this variability, there is a relatively low incidence of traditionally measured "critical" outcomes within any single pediatric surgical system or even pediatric surgical subspecialty, rendering the currently available quality measurement tools inadequate to provide sensitive measures of quality. In an era when scalable solutions are required to improve health outcomes across entire populations, there is an urgent need for more holistic measures of a child's well-being to benchmark and measure changes in quality of care. This article discusses opportunities for enhanced performance measurement in pediatric surgery using a value-based framework to identify and measure patient and family outcomes of importance over the full care cycle, from initial presentation through surgery and recovery to sustainability of health. In suggesting new avenues for performance measurement, we highlight how these measures can be used to develop, evaluate and refine surgical system innovations such as bundled care pathways and perioperative care homes.

Osmoregulatory responses of glucous-winged gulls (Larus glaucescens) to dehydration and hemorrhage

The effects of dehydration and hemorrhage on plasma ionic, osmotic, and antidiuretic hormone (arginine vasotocin) concentrations and of hemorrhage on salt gland secretion and glomerular filtration rate were evaluated in glaucous-winged gulls, Larus glaucescens. Dehydration for 24 h did not affect plasma ionic, osmotic or arginine vasotocin concentrations; 72 h dehydration significantly elevated plasma osmolality, plasma sodium and chloride concentrations, and plasma arginine vasotocin concentration, but did not affect plasma potassium concentration. Constant infusion of 0.8 mol.1-1 NaCl increased plasma arginine vasotocin concentration and produced salt gland secretion in seven gulls; four secreted well, while three secreted less well. Removal of 20% blood volume during saline infusion immediately reduced (P<0.001) salt gland secretion rate in all gulls. After bleeding, good secretors maintained glomerular filtration rate and urine flow rate; the poorer secretors increased glomerular filtration rate and became diuretic. Blood replacement returned salt gland secretion rate to the prebleeding level (P<0.05) without affecting salt gland secretions sodium concentration in gulls which secreted well, but did not restimulate salt gland secretion in gulls which secreted poorly. Reinfusion of blood had no effect on glomerular filtration rate. Bleeding and blood replacement did not affect plasma arginine vasotocin concentration.