Cardiovascular Risk in Men with Prostate Cancer: Insights from the RADICAL PC Study.

PURPOSE: We describe the cardiovascular risk profile in a representative cohort of patients with prostate cancer treated with or without androgen deprivation therapy. MATERIALS AND METHODS: We prospectively characterized in detail 2,492 consecutive men (mean age 68 years) with prostate cancer (newly diagnosed or with a plan to prescribe androgen deprivation therapy for the first time) from 16 Canadian sites. Cardiovascular risk was estimated by calculating Framingham risk scores. RESULTS: Most men (92%) had new prostate cancer (intermediate risk 41%, high risk 50%). The highest level of education achieved was primary school in 12%. Most (58%) were current or former smokers, 22% had known cardiovascular disease, 16% diabetes, 45% hypertension, 31% body mass index 30 kg/m2 or greater, 24% low levels of physical activity, mean handgrip strength was 37.3 kg and 69% had a Framingham risk score consistent with high cardiovascular risk. Participants in whom androgen deprivation therapy was planned had higher Framingham risk scores than those not intending to receive androgen deprivation therapy, and this risk was abolished after adjustment for confounders. CONCLUSIONS: Two-thirds of men with prostate cancer are at high cardiovascular risk. There is a positive association between a plan to use androgen deprivation therapy and baseline cardiovascular risk factors. However, this association is explained by confounding factors.

Development and Acceptability Testing of a Patient Decision Aid for Urinary Diversion with Radical Cystectomy.

PURPOSE: The choice of urinary diversion at cystectomy is a life altering decision. Patient decision aids are clinical tools that promote shared decision making by providing information about management options and helping patients communicate their values. We sought to develop and evaluate a patient decision aid for individuals undergoing cystectomy with urinary diversion. MATERIALS AND METHODS: We used the IPDAS (International Patient Decision Aids Standards) to guide a systematic development process. A literature review was performed to determine urinary diversion options and the incidence of outcomes. We created a prototype using the Ottawa Decision Support Framework. A 10-question survey was used to assess patient decision aid acceptability among patients, allied health professionals and urologists. The primary outcome was acceptability of the patient decision aid. RESULTS: Ileal conduit and orthotopic neobladder were included as primary urinary diversion options because they had the most evidence and are most commonly performed. Continent cutaneous diversion was identified as an alternative option. Outcomes specific to ileal conduit were stomal stenosis and parastomal hernia. Outcomes specific to neobladder were daytime and nighttime urinary incontinence and urinary retention. Acceptability testing was completed by 8 urologists, 9 patients and 1 advanced practice nurse. Of the respondents 94% reported that the language was appropriate, 94% reported that the length was adequate and 83% reported that option presentation was balanced. The patient decision aid met all 6 IPDAS defining criteria, all 6 certification criteria and 21 of 23 quality criteria. CONCLUSIONS: We created a novel patient decision aid to improve the quality of decisions made by patients when deciding among urinary diversion options. Effectiveness testing will be performed prospectively.

A Phase II, Randomized, Multicenter Study Comparing 10 Months versus 4 Months of Degarelix Therapy in Prolonging the Off Treatment Interval in Men with Localized Prostate Cancer Receiving Intermittent Androgen Deprivation Therapy for Biochemical Recurrence following Radical Local Therapy.

PURPOSE: Clinical trials in men initiating intermittent androgen deprivation therapy have used a range of induction durations between 3 and 12 months. We sought to determine whether the duration of induction androgen deprivation therapy would influence the duration of the off treatment interval and the recovery of serum testosterone. MATERIALS AND METHODS: This was a prospective, randomized, open label study. Men with biochemical recurrence after local therapy for prostate cancer and a negative bone scan were randomized to 4 and 10 months of monthly degarelix. The first dose was 240 mg and subsequent doses were 80 mg per month. Quality of life was evaluated by the I-PSS (International Prostate Symptom Score), the PAS-SFI (Problem Assessment Scale of the Sexual Function Index) and the FACT-P (Functional Assessment of Cancer Therapy-Prostate). RESULTS: A total of 90 patients were randomized, including 43 to 4 months and 47 to 10 months of treatment. There was no difference in any relevant baseline laboratory parameter, including prostate specific antigen and testosterone. There was no difference between the 2 treatment groups in time off treatment (HR 1.51, 95% CI 0.60-3.84, p = 0.38). Actuarial median time to testosterone recovery to 8.0 nmol/l or greater was 8.05 months (95% CI 4.34-39.89) in the 10-month treatment arm and 6.24 months (95% CI 5.45-15.90) in the 4-month treatment arm. The log rank test showed no statistical significance between the 2 treatment groups in time to testosterone recovery (p = 0.8392). There was no difference in the testosterone recovery rate between the 2 arms. Men younger than 65 years had a considerably shorter interval off treatment and time to testosterone recovery. There was a lesser adverse effect on quality of life at the end of treatment in the 4-month than in the 10-month arm. CONCLUSIONS: In men with biochemical recurrence who initiated intermittent androgen deprivation therapy with degarelix no difference was observed in the duration of the off treatment interval or the rate of testosterone recovery whether they received 4 or 10 months of induction androgen deprivation therapy.

Prognostic pathological factors in radical cystectomy after neoadjuvant chemotherapy.

AIMS: We undertook a systematic evaluation of the prognostic value of numerous histological factors in 165 radical cystectomies (RCs) of patients with invasive urothelial carcinoma (UC) who underwent surgery after neoadjuvant chemotherapy (NAC). METHODS AND RESULTS: Tumour regression grade (TRG) and therapy-related stromal and epithelial changes were also recorded. Locally advanced disease (≥pT2 and/or pN+) was present in 64% of patients, 22% had no evidence of residual carcinoma (pT0 + pN0), and 28% had no evidence of residual muscle-invasive carcinoma (≤pT1 + N0). TRG1, TRG2 and TRG3 were found in 32%, 15% and 50% of patients, respectively. Histological variants of UC were reported in 25% of cases. The most common therapy-related stromal change was fibroblastic reaction (78%), and the most common epithelial change in residual UC was smudgy and poorly preserved chromatin (28%). Prominent stromal and epithelial changes were noted in 41% and 5% of RCs, respectively. Progression was found in 45% of patients, and cancer-related deaths occurred in 30%. Multivariate analysis showed that the only independent prognostic parameters for progression were T stage, N stage, lymphovascular invasion, and margin status. Similarly, only T stage, N stage and margin status correlated with cancer-related deaths. Neither TRG nor any of the stromal-related or epithelial-related variables correlated with outcome. CONCLUSIONS: We confirm that the traditional and routinely reported histological parameters in RC post-NAC remain the most powerful prognosticators of disease course. The significance of TRG in the bladder remains unconfirmed.

Benefit of Whole-Pelvis Radiation for Patients With Muscle-Invasive Bladder Cancer: An Inverse Probability Treatment Weighted Analysis.

PURPOSE: The value of pelvic lymph node irradiation is debated for patients with muscle-invasive bladder cancer (MIBC) undergoing curative-intent radiation therapy (RT). We sought to compare the oncological outcomes between bladder-only (BO)-RT and whole-pelvis (WP)-RT using a large Canadian multicenter collaborative database. PATIENTS AND METHODS: The study cohort consisted of 809 patients with MIBC (cT2-4aN0-2M0) who underwent curative RT at academic centers across Canada. Patients were divided into two groups on the basis of the RT volume: WP-RT versus BO-RT. Inverse probability of treatment weighting (IPTW) and absolute standardized differences (ASDs) were used to balance covariates across treatment groups. Regression models were used to assess the effect of the RT volume on the rates of complete response (CR), cancer-specific survival (CSS), and overall survival (OS). RESULTS: After exclusion criteria, 599 patients were included, of whom 369 (61.6%) underwent WP-RT. Patients receiving WP-RT were younger (ASD, 0.41) and more likely to have an Eastern Cooperative Oncology Group performance status of 0-1 (ASD, 0.21), clinical node-positive disease (ASD, 0.40), and lymphovascular invasion (ASD, 0.25). In addition, WP-RT patients were more commonly treated with neoadjuvant chemotherapy (ASD, 0.29) and concurrent chemotherapy (ASD, 0.44). In the IPTW cohort, BO-RT and WP-RT groups were well balanced (all pretreatment parameters with an ASD <0.10). In multivariable analysis, WP-RT was not associated with CR rates post-RT (odds ratio, 1.14 [95 CI, 0.76 to 1.72]; P = .526) but was associated with both CSS (hazard ratio [HR], 0.66 [95% CI, 0.47 to 0.93]; P = .016) and OS (HR, 0.68 [95% CI, 0.54 to 0.87]; P = .002), independent of other prognostic factors. CONCLUSION: Our study demonstrated that WP radiation was associated with better survival compared with bladder radiation alone after adjusted analysis. Additional randomized controlled trials are needed to confirm our findings.

Effect of Complete Transurethral Resection on Oncologic Outcomes After Radiation Therapy for Muscle-Invasive Bladder Cancer.

PURPOSE: To compare the oncologic outcomes of patients with nonmetastatic muscle-invasive bladder cancer (MIBC) undergoing complete versus incomplete transurethral tumor resection (TURBT) before radiation therapy. METHODS AND MATERIALS: Patients with nonmetastatic MIBC who underwent curative-intent radiation therapy between 2002 and 2018 at 10 Canadian institutions were retrospectively evaluated. Inverse probability of treatment weighting was performed using baseline characteristics. Differences in survival outcomes by complete and incomplete TURBT were analyzed. RESULTS: Of the 757 patients included, 66% (498) had documentation of a complete and 34% (259) an incomplete TURBT. Before adjustment, 121 (47%) and 45 (9%) patients who underwent incomplete and complete TURBT, respectively, were diagnosed with cT3-4 tumor (P <.001). After weight-adjustment, all baseline cohort characteristics were balanced (absolute standardized differences < 0.1). The adjusted median follow-up was 27 months. Adjusted survival analyses showed no significant difference in 5-year overall survival (48% vs 52%, 1.03 [0.82-1.29]; P = .8), cancer-specific survival (64% vs 61%, 0.93 [0.70-1.25]; P = .7), metastasis-free survival (43% vs 46%, 0.97 [0.79-1.19]; P = .8), and disease-free survival (32% vs 35%, 0.95 [0.79-1.15]; P = .7) between the 2 groups. CONCLUSIONS: Complete TURBT may be associated with clinical organ-confined disease. Extent of TURBT was not independently associated with oncologic outcomes in patients with MIBC treated with radiation therapy.

Benefit of Neoadjuvant Cisplatin-based Chemotherapy for Invasive Bladder Cancer Patients Treated with Radiation-based Therapy in a Real-world Setting: An Inverse Probability Treatment Weighted Analysis.

BACKGROUND: Neoadjuvant chemotherapy (NAC) improves survival for patients with muscle-invasive bladder cancer (MIBC) treated with radical cystectomy. Studies on the potential benefit of NAC before radiation-based therapy (RT) are conflicting. OBJECTIVE: To evaluate the effect of NAC on patients with MIBC treated with curative-intent RT in a real-world setting. DESIGN, SETTING, AND PARTICIPANTS: The study cohort consisted of 785 patients with MIBC (cT2-4aN0-2M0) who underwent RT at academic centers across Canada. Patients were classified into two treatment groups based on the administration of NAC before RT (NAC vs no NAC). OUTCOME MEASUREMENTS AND STATISTICAL ANALYSIS: The inverse probability of treatment weighting (IPTW) with absolute standardized differences (ASDs) was used to balance covariates across treatment groups. The impact of NAC on complete response, overall, and cancer-specific survival (CSS) after RT in the weighted cohort was analyzed. RESULTS AND LIMITATIONS: After applying the exclusion criteria, 586 patients were included; 102 (17%) received NAC before RT. Patients in the NAC subgroup were younger (mean age 65 vs 77 yr; ASD 1.20); more likely to have Eastern Cooperative Oncology Group performance status 0-1 (87% vs 78%; ASD 0.28), lymphovascular invasion (32% vs 20%; ASD 0.27), higher cT stage (cT3-4 in 29% vs 20%; ASD 0.21), and higher cN stage (cN1-2 in 32% vs 4%; ASD 0.81); and more commonly treated with concurrent chemotherapy (79% vs 67%; ASD 0.28). After IPTW, NAC versus no NAC cohorts were well balanced (ASD <0.20) for all included covariates. NAC was significantly associated with improved CSS (hazard ratio [HR] 0.28; 95% confidence interval [CI] 0.14-0.56; p < 0.001) and overall survival (HR 0.56; 95% CI 0.38-0.84; p = 0.005). This study was limited by potential occult imbalances across treatment groups. CONCLUSIONS: If tolerated, NAC might be associated with improved survival and should be considered for eligible patients with MIBC planning to undergo bladder preservation with RT. Prospective trials are warranted. PATIENT SUMMARY: In this study, we showed that neoadjuvant chemotherapy might be associated with improved survival in patients with muscle-invasive bladder cancer who elect for curative-intent radiation-based therapy.

Bibliometric analysis of academic journal recommendations and requirements for surgical and anesthesiologic adverse events reporting.

BACKGROUND: Standards for reporting surgical adverse events (AEs) vary widely within the scientific literature. Failure to adequately capture AEs hinders efforts to measure the safety of healthcare delivery and improve the quality of care. The aim of the present study is to assess the prevalence and typology of perioperative AE reporting guidelines among surgery and anesthesiology journals. MATERIALS AND METHODS: In November 2021, three independent reviewers queried journal lists from the SCImago Journal & Country Rank (SJR) portal (www.scimagojr.com), a bibliometric indicator database for surgery and anesthesiology academic journals. Journal characteristics were summarized using SCImago, a bibliometric indicator database extracted from Scopus journal data. Quartile 1 (Q1) was considered the top quartile and Q4 bottom quartile based on the journal impact factor. Journal author guidelines were collected to determine whether AE reporting recommendations were included and, if so, the preferred reporting procedures. RESULTS: Of 1409 journals queried, 655 (46.5%) recommended surgical AE reporting. Journals most likely to recommend AE reporting were: by category surgery (59.1%), urology (53.3%), and anesthesia (52.3%); in top SJR quartiles (i.e. more influential); by region, based in Western Europe (49.8%), North America (49.3%), and the Middle East (48.3%). CONCLUSIONS: Surgery and anesthesiology journals do not consistently require or provide recommendations on perioperative AE reporting. Journal guidelines regarding AE reporting should be standardized and are needed to improve the quality of surgical AE reporting with the ultimate goal of improving patient morbidity and mortality.

Increasing detection and increasing incidence in thyroid cancer.

BACKGROUND: It has been proposed that the increasing incidence of thyroid cancer is due to increasing detection. METHODS: Using administrative data, we compare by year from 1993 to 2006, the rates of diagnostic imaging tests of the neck (computed axial tomography--CT, magnetic resonance imaging--MRI, and non-obstetrical ultrasound--US) to the incidence of thyroid cancer for the population of the Province of Ontario Canada. RESULTS: Women and men have different rates of tests, and those rates reflect the rates of new diagnoses of thyroid cancer. CONCLUSIONS: The rising incidence of thyroid disease in women is associated with increasing numbers of diagnostic imaging tests.

Approach to primary care follow-up of patients with prostate cancer.

OBJECTIVE: To review resources available to aid family physicians in their care of prostate cancer patients and develop an algorithm to summarize these findings. SOURCES OF INFORMATION: MEDLINE, EMBASE, and relevant website search. All relevant guidelines were level III evidence. MAIN MESSAGE: Improved screening and treatment of patients with prostate cancer is resulting in an increasing number of survivors. These men require ongoing monitoring, a responsibility that is largely falling to family physicians. We review the expected prostate-specific antigen (PSA) responses to different prostate cancer treatment modalities and provide an appropriate schedule of follow-up and monitoring techniques for prostate cancer patients. CONCLUSION: In light of the paucity of resources for family physicians in their ongoing care of prostate cancer patients, we present an algorithm, primarily based on PSA kinetics, for practical use in the continuing care of these patients.

Quality indicators in the management of bladder cancer: A modified Delphi study.

BACKGROUND: Survival in patients with bladder cancer has only moderately improved over the past 2 decades. A potential reason for this is nonadherence to clinical guidelines and best practice, leading to wide variations in care. Common quality indicators (QIs) are needed to quantify adherence to best practice and provide data for benchmarking and quality improvement. OBJECTIVE: To produce an evidence- and consensus-based list of QIs for the management of bladder cancer. METHODS: A modified Delphi method was used to develop the indicator list. Candidate indicators were extracted from the literature and rated by a 27-member Canadian expert panel in several rounds until consensus was reached on the final list of indicators. In rounds with numeric ratings, a frequency analysis was performed. RESULTS: A total of 86 indicators were rated, 52 extracted from the literature and 34 suggested by the panel. After iterative rounds of ratings and discussion, a final list of 60 QIs spanning several disciplines and phases of the cancer care continuum was developed. CONCLUSIONS: This is the first study to comprehensively produce common QIs representing structure, process, and outcome measures in bladder cancer management. Though developed in Canada, these indicators can be used in other countries with slight modifications to track performance and improve care.

Does prolonging the time to bladder cancer surgery affect long-term cancer control: a systematic review of the literature.

BACKGROUND: Prolonged surgical wait times have significant effects on a patient's psychological well-being and a negative impact on quality of life but the effect on long-term cancer control is controversial. We conducted a systematic review of the bladder cancer literature to examine the best available evidence addressing the following key questions: What is the reported time interval for bladder cancer patients from the decision to operate until the day of bladder cancer surgery? Are there recommendations/guidelines in the urological cancer literature and, if so, how do the Canadian times compare? Is there a known association between duration of wait time beyond the recommended standard and clinical outcome (i.e., recurrence-free survival, overall survival)? METHODS: A structured literature search PubMed, Embase, the Cochrane Database and Google Scholar from January 1965 to January 2006 was conducted for published studies and international guidelines/consensus documents that evaluated surgical wait times for bladder cancer. Data extracted from eligible studies included median time to bladder cancer surgery from diagnosis and key patient outcomes, such as survival rate or adjusted hazard ratios (HR). RESULTS: Eighteen studies evaluating wait times for bladder cancer surgery were identified, ten of which measured the association between prolonged waiting time and overall survival or tumor grade. Differences in study data availability, method of analysis and wait time definitions precluded statistical pooling of the findings. Median wait times from various points of patient contact ranged from 29 days (urologist consultation to transurethral resection) to 164 days (general practitioner referral to surgery). In the lone Canadian epidemiological study, which focused on all types of urological cancer, median wait time was 64 days from referral to surgery. This was in contrast to national and international guidelines, which recommended a maximum wait time between 2 and 4 weeks for all cancer surgeries. The association between surgical delay and overall survival remained controversial with some studies reporting a reduced overall survival in patients with prolonged delays, while others failed to find such associations. However, the three studies that measured the association between a delay of (3) 3 months and tumor grade reported that patients in the prolonged delay groups had an overall poorer tumor grade. CONCLUSIONS: In Canada, it appears that current wait times for urological surgeries, such as for bladder cancer, are beyond the threshold recommended by national and international expert bodies. Even though the association between surgical delay and overall survival remains inconclusive, there is evidence to suggest that prolonged delays are associated with an overall poorer tumor grade. To provide the necessary guidance and recommendations on these issues to the federal and provincial governments, the surgical wait times (SWAT) initiative was developed. Through a partnership of the key stakeholders, it is the vision of SWAT to ultimately improve the care and quality of life of bladder cancer patients and their families.

Mechanisms Of Hypoxia-Induced Immune Escape In Cancer And Their Regulation By Nitric Oxide.

The acquired ability of tumour cells to avoid destruction by immune effector mechanisms (immune escape) is important for malignant progression. Also associated with malignant progression is tumour hypoxia, which induces aggressive phenotypes such as invasion, metastasis and drug resistance in cancer cells. Our studies revealed that hypoxia contributes to escape from innate immunity by increasing tumour cell expression of the metalloproteinase ADAM10 in a manner dependent on accumulation of the alpha subunit of the transcription factor hypoxia-inducible factor-1 (HIF-1α). Increased ADAM10 expression leads to shedding of the NK cell-activating ligand, MICA, from the surface of tumour cells, thereby resulting in resistance to NK cell-mediated lysis. Our more recent studies demonstrated that hypoxia, also via HIF-1α accumulation, increases the expression of the inhibitory co-stimulatory ligand PD-L1 on tumour cells. Elevated PD-L1 expression leads to escape from adaptive immunity via increased apoptosis of CD8+ cytotoxic T lymphocytes. Accumulating evidence indicates that hypoxia-induced acquisition of malignant phenotypes, including immune escape, is in part due to impaired nitric oxide (NO)-mediated activation of cGMP signalling and that restoration of cGMP signalling prevents such hypoxic responses. We have shown that NO/cGMP signalling inhibits hypoxia-induced malignant phenotypes likely in part by interfering with HIF-1α accumulation via a mechanism involving calpain. These findings indicate that activation of NO/cGMP signalling may have useful applications in cancer therapy.

Separation of benign and malignant glands in prostatic adenocarcinoma.

This paper presents an analysis of the high resolution histopathology images of the prostate with a focus on the evolution of morphological gland features in prostatic adenocarcinoma. Here we propose a novel technique of labeling individual glands as malignant or benign. In the first step, the gland and nuclei objects of the images are automatically segmented. Individual gland units are segmented out by consolidating their lumina with the surrounding layers of epithelium and nuclei. The nuclei objects are segmented by using a marker controlled watershed algorithm. Two new features, Number of Nuclei Layer (N(NL)) and Ratio of Epithelial layer area to Lumen area (R(EL)) have been extracted from the segmented units. The main advantage of this approach is that it can detect individual malignant gland units, irrespective of neighboring histology and/or the spatial extent of the cancer. The proposed algorithm has been tested on 40 histopathology scenes taken from 10 high resolution whole mount images and achieved a sensitivity of 0.83 and specificity of 0.81 in a leave-75%-out cross-validation.

Prostate cancer probability maps based on ultrasound RF time series and SVM classifiers.

We describe a very efficient method based on ultrasound RF time series analysis and support vector machine classification for generating probabilistic prostate cancer colormaps to augment the biopsy process. To form the RF time series, we continuously record ultrasound RF echoes backscattered from tissue while the imaging probe and the tissue are stationary in position. In an in-vitro study involving 30 prostate specimens, we show that the features extracted from RF time series are significantly more accurate and sensitive compared to two other established categories of ultrasound-based tissue typing methods. The method results in an area under ROC curve of 0.95 in 10-fold cross-validation.