Publications by authors named "Robert Tarrell"

Article Synopsis
  • The study aimed to use AI algorithms on CT images to measure muscle and fat areas in patients before radical cystectomy (RCx) and link these measurements to complications after surgery.
  • It analyzed data from 843 RCx patients between 2009 and 2017 and found that higher levels of certain types of fat were linked to increased complications, while higher skeletal muscle was associated with fewer complications.
  • The findings suggest that AI-derived body composition information could help tailor patient care and improve pre-operative counseling by considering both physical metrics and other patient factors.
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Introduction: Variant histology (VH) bladder cancer is often associated with poor outcomes and the role of neoadjuvant chemotherapy (NAC) remains incompletely defined. Our objective was to determine comparative pathologic downstaging at radical cystectomy (RC) following NAC for patients with and without VH.

Patients And Methods: Patients who underwent RC at 2 tertiary referral centers (1996-2018) were included.

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Objective: To report peri-operative outcomes of a contemporary series of bladder cancer patients undergoing radical cystectomy (RC) with cutaneous ureterostomy (CU) urinary diversion at a tertiary referral center.

Methods: We retrospectively identified patients who underwent RC with CU at Mayo Clinic between 2016 and 2021. Clinicopathologic and perioperative characteristics were analyzed using standard descriptive statistics.

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Purpose: Our objective was to examine whether perioperative blood transfusion is associated with venous thromboembolism following radical cystectomy adjusting for both patient- and disease-related factors.

Materials And Methods: Patients who underwent radical cystectomy for bladder cancer from 1980-2020 were identified in the Mayo Clinic cystectomy registry. Blood transfusion during the initial postoperative hospitalization was analyzed as a 3-tiered variable: no transfusion, postoperative transfusion alone, or intraoperative with or without postoperative transfusion.

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Objective: To compare the perioperative and oncologic outcomes associated with RCNU to a matched cohort undergoing RC alone. Simultaneous radical cystectomy and nephroureterectomy (RCNU) for synchronous upper tract and bladder urothelial carcinoma is an uncommon procedure. Sparse literature exists comparing outcomes in patients treated with radical cystectomy (RC) alone versus RCNU.

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Purpose: Oncologic outcomes following urethral recurrence (UR) remain incompletely described, with reports limited by small cohort sizes. We evaluated risk factors for UR as well as cancer-specific survival (CSS) and overall survival (OS) among patients with UR.

Materials And Methods: We reviewed our institutional radical cystectomy (RC) registry to identify patients with UR.

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Introduction: While numerous current clinical trials are testing novel salvage therapies (ST) for patients with recurrent nonmuscle invasive bladder cancer (NMIBC) after bacillus Calmette-Guérin (BCG), the natural history of this disease state has been poorly defined to date. Herein, we evaluated oncologic outcomes in patients previously treated with BCG and ST who subsequently underwent radical cystectomy (RC).

Methods: We identified 378 patients with high-grade NMIBC who received at least one complete induction course of BCG (n = 378) with (n = 62) or without (n = 316) additional ST and who then underwent RC between 2000 and 2018.

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Introduction: Intraoperative hypothermia (IOH) has been suggested to adversely impact outcomes following surgery. The objective of this study was to evaluate the association between IOH and survival following radical cystectomy (RC).

Methods: Patients who underwent RC for bladder cancer from 2003 to 2018 were identified in our cystectomy registry.

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Objective: We evaluated the natural history and long-term outcomes of incidentally detected prostate cancer (PCa) at radical cystectomy (RC) for bladder cancer (BCa).

Patients And Methods: We identified 1,640 male patients who underwent RC between 1992 and 2012. Patients were stratified as clinically insignificant and clinically significant PCa, based on Grade Group (GG) 1 and ≥2, respectively.

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Background: Up to one in ten patients undergoing cystectomy with urinary diversion develop a ureteroenteric stricture (UES). Despite unrecognized ureteral obstruction contributing to infection, nephrolithiasis, and/or progression of kidney disease, the long-term natural history and risk factors associated with UES remains understudied. Herein, we report our single institutional experience with the long-term incidence, clinical presentation, and risk factors associated with UES formation following urinary diversion.

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Introduction: The objective of the study was to determine whether sarcopenia is associated with pathologic and survival outcomes for patients with muscle-invasive bladder cancer (MIBC) treated with neoadjuvant chemotherapy (NAC) followed by radical cystectomy (RC).

Patients And Methods: We identified MIBC patients treated with cisplatin-based NAC in our cystectomy registry from 2000 to 2016. Pre- and post-NAC computed tomography images were analyzed with BodyCompSlicer, a validated body composition assessment tool.

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Introduction: To examine the nature, timing, and risk factors underlying return to the operating room (ROR) following radical cystectomy (RC). ROR has been proposed as a surgical quality metric based on data from the general surgery literature, but ROR has not been comprehensively characterized following RC.

Patients And Methods: We queried our institutional Cystectomy Registry from 2000 to 2016 to identify patients with ROR within 90 days of RC.

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Purpose: Aspirin may have antineoplastic properties through the inhibition of inflammatory cytokines that regulate cell proliferation, angiogenesis and apoptosis. In patients with nonmuscle invasive bladder cancer aspirin use has been linked to a reduced risk of recurrence. We evaluated the association of aspirin with survival following radical cystectomy.

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Background: QT prolongation is an independent risk factor for sudden death, stroke, and all-cause mortality. However, additional studies have shown that in certain settings, QT prolongation may be transient and a result of external factors.

Objective: In this study, we evaluated the clinical characteristics and outcomes of patients seen in the emergency department (ED) with QT prolongation.

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Purpose: To evaluate perioperative and oncologic outcomes of patients undergoing radical cystectomy (RC) for recurrence of urothelial carcinoma (UC) after prior partial cystectomy (PC), and to compare these outcomes to patients undergoing primary RC.

Methods: Patients who underwent RC for recurrence of UC after prior PC were matched 1:3 to patients undergoing primary RC based on age, pathologic stage, and decade of surgery. Perioperative and oncologic outcomes were compared using Wilcoxon sign-rank test, McNemars test, the Kaplan-Meier method, and Cox proportional hazards regression analyses.

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Commonly used drugs in hospital setting can cause QT prolongation and trigger life-threatening arrhythmias. We evaluate changes in prescribing behavior after the implementation of a clinical decision support system to prevent the use of QT prolonging medications in the hospital setting. We conducted a quasi-experimental study, before and after the implementation of a clinical decision support system integrated in the electronic medical record (QT-alert system).

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Unlabelled: While it has been demonstrated that receipt of neoadjuvant chemotherapy (NAC) before radical cystectomy (RC) improves survival compared to RC alone, the driving factor for this benefit may be from patients with ypT0 status at surgery. Meanwhile, the implications of having residual urothelial carcinoma of the bladder (rUCB) at RC after NAC are less clear. We therefore evaluated whether survival differed between patients with rUCB at RC after NAC and stage-matched controls who underwent RC alone.

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In radical cystectomy specimens with bladder cancer, lymphatic and vascular invasion are often reported as 'angiolymphatic' or 'lymphovascular' invasion, terms that combine the findings of tumour within simple endothelial-lined lymphatic spaces and tumour within muscle-lined blood vessels. It is unclear if these patterns of invasion have different prognostic significance. In addition, there are conflicting data regarding the significance of lymphatic, vascular and perineural invasion in patients with bladder cancer.

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Objective: To evaluate oncological outcomes after radical cystectomy (RC) in patients with plasmacytoid urothelial carcinoma (UC) and to compare survival to that in patients with pure UC of the bladder.

Materials And Methods: We identified 46 patients with plasmacytoid UC and 972 with pure UC who were treated with RC between 1980 and 2009. All pathologic specimens were re-reviewed by a single GU pathologist.

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Objective: The development of a ureteroenteric anastomotic (UEA) stricture has been reported in up to 15% of patients undergoing radical cystectomy (RC) with urinary diversion. Although benign strictures are thought to be the result of ischemia, the incidence, risk factors, and outcomes of patients with malignant UEA strictures have not been well described.

Material And Methods: We reviewed 2,523 patients treated with RC for bladder cancer from 1980 to 2012 at Mayo Clinic.

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Patients undergoing surgery are often exposed to QT-inciting factors that may increase the risk for complications. We evaluated the clinical characteristics and outcomes of patients with QTc ≥500 ms within the first 24 hours after surgery as identified by an institution-wide electrocardiogram alert system. From November 2010 to June 2011, 470 patients exhibited an electrocardiographically isolated QTc ≥500 ms.

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Objectives: To evaluate the association of ABO blood type with clinicopathologic outcomes and mortality among patients with urothelial carcinoma of the bladder treated with radical cystectomy (RC).

Patients And Methods: We identified 2,086 consecutive patients who underwent RC between 1980 and 2008. Postoperative recurrence-free survival (RFS) and cancer-specific survival (CSS) were estimated using the Kaplan Meier method and compared with the log-rank test.

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Objectives: To evaluate the differences in estimated glomerular filtration rate decline by urinary diversion type (incontinent diversion vs continent diversion) and preoperative estimated glomerular filtration rate among patients undergoing radical cystectomy and urinary diversion.

Methods: We evaluated 1383 patients treated with radical cystectomy between 1980-2006 who had a preoperative estimated glomerular filtration rate of 45-89 mL/min/1.73 m(2).

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QT prolongation is an independent risk factor for cardiovascular mortality in adults. However, there is little information available on pediatric patients with QT prolongation and their outcomes. Herein, we evaluated the prevalence of QT prolongation in pediatric patients identified by an institution-wide QT alert system, and the spectrum of their phenotype.

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Objective: To review our experience with radical cystectomy for small cell carcinoma of the bladder, to compare outcomes with a cohort of patients with urothelial carcinoma, and to determine the effect of adjuvant chemotherapy and pathology re-review in this setting.

Methods: Among 2427 patients who underwent radical cystectomy, 68 patients had small cell carcinoma of the bladder. Patients with small cell carcinoma of the bladder were compared with an unmatched cohort of 1146 patients with urothelial carcinoma, and were then matched (1:2) based on TNM stage.

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