Publications by authors named "Alvin C Goh"

Purpose: Ureteral stents are commonly placed intraoperatively during radical cystectomy, although their efficacy in reducing complications is unproven. We compared clinical outcomes among patients undergoing robot-assisted radical cystectomy with intracorporeal ileal conduit (RARC-IC) with or without ureteral stents to determine if omission of ureteral stents affects postoperative complications.

Materials And Methods: All RARC-IC surgeries performed at our institution between November 2017 and June 2023 were reviewed.

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  • Robotic arm surgical systems are increasingly being evaluated for their effectiveness in neurosurgery, particularly for spinal nerve sheath tumors (NSTs), which are less commonly treated with this technology.
  • A study looked at 19 cases of robotic-assisted tumor resections, with key findings showing a 100% gross total resection rate and shorter hospital stays compared to traditional open surgery.
  • The results suggest that robotic surgery can be a safe and effective option for complex tumors, potentially reducing surgical risks and improving patient outcomes in neurosurgery.
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Purpose: Incisional hernias are a frequent complication following robotic radical prostatectomy. Observational data in men undergoing robotic prostatectomy suggest that transverse closure resulted in lower hernia rates than vertical closure. We sought to compare the incidence of incisional hernia after robotic radical prostatectomy after vertical and transverse extraction site closure.

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  • * A study analyzed outcomes of patients treated for muscle-invasive urothelial bladder cancer, identifying lymphovascular invasion (LVI) as a crucial predictor of recurrence-free survival (RFS), with patients lacking LVI showing significantly better outcomes.
  • * Genomic analysis revealed chemotherapy-resistant tumors had fewer mutations in DNA damage response genes compared to chemotherapy-naïve tumors, suggesting that certain genetic markers might guide patient management.
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Background: Surgical education lacks a standardized, proficiency-based approach to evaluation and feedback.

Objective: To assess the implementation and reception (ie, feasibility) of an automated, standardized, longitudinal surgical skill assessment and feedback system, and identify baseline trainee (resident and fellow) characteristics associated with achieving proficiency in robotic surgery while learning robotic-assisted laparoscopic prostatectomy.

Design Setting And Participants: A quality improvement study assessing a pilot of a surgical experience tracking program was conducted over 1 yr.

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This review focuses on the principles, applications, and performance of mpMRI for bladder imaging. Quantitative imaging biomarkers (QIBs) derived from mpMRI are increasingly used in oncological applications, including tumor staging, prognosis, and assessment of treatment response. To standardize mpMRI acquisition and interpretation, an expert panel developed the Vesical Imaging-Reporting and Data System (VI-RADS).

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There is a need to develop user-friendly imaging tools estimating robust quantitative biomarkers (QIBs) from multiparametric (mp)MRI for clinical applications in oncology. Quantitative metrics derived from (mp)MRI can monitor and predict early responses to treatment, often prior to anatomical changes. We have developed a vendor-agnostic, flexible, and user-friendly MATLAB-based toolkit, MRI-Quantitative Analysis and Multiparametric Evaluation Routines ("MRI-QAMPER", current release v3.

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Background: Neoadjuvant chemotherapy (NAC) before radical cystectomy is standard of care in patients with muscle-invasive bladder cancer (MIBC). Response assessment after NAC is important but suboptimal using CT. We assessed MRI without vs.

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Purpose: To create a suturing skills assessment tool that comprehensively defines criteria around relevant sub-skills of suturing and to confirm its validity.

Materials And Methods: 5 expert surgeons and an educational psychologist participated in a cognitive task analysis (CTA) to deconstruct robotic suturing into an exhaustive list of technical skill domains and sub-skill descriptions. Using the Delphi methodology, each CTA element was systematically reviewed by a multi-institutional panel of 16 surgical educators and implemented in the final product when content validity index (CVI) reached ≥0.

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Introduction: There are no meta-analyses of randomized controlled trials (RCTs) comparing open radical cystectomy (OR C) with robot-assisted radical cystectomy (RARC), inclusive of both intracorporeal (iRARC) and extracorporeal (hybrid RARC, hRARC) urinary reconstruction.

Methods: MEDL INE, Embase, Scopus, the International Clinical Trials Registry Platform and ClinicalTrials.gov registries were searched in May 2022.

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Introduction/background: The surgical residency model assumes that upon completion, a surgeon is ready to practice and grow independently. However, many surgeons fail to improve after reaching proficiency, which in certain instances has correlated with worse clinical outcomes. Coaching addresses this problem and furthers surgeons' education post-residency.

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Purpose: To compare oncologic outcomes and genomic alteration profiles in patients with bladder and urachal adenocarcinoma, urothelial carcinoma (UC) with glandular differentiation, and UC, not otherwise specified (NOS) undergoing surgical resection, with emphasis on response to systemic therapy.

Methods: We identified patients with bladder cancer with glandular variants who underwent surgical resection at Memorial Sloan Kettering from 1995 to 2018 (surgical cohort) and/or patients who had tumor sequencing using a targeted next-generation sequencing platform (genomics cohort). Pathologic complete and partial response rates to neoadjuvant chemotherapy (NAC) and recurrence-free and cancer-specific survival were measured.

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Objectives: To analyse the risk of uretero-enteric anastomotic stricture in patients randomised to open (ORC) or robot-assisted radical cystectomy (RARC) with extracorporeal urinary diversion.

Patients And Methods: We included 118 patients randomised to RARC (n = 60) or ORC (n = 58) at a single, high-volume institution from March 2010 to April 2013. Urinary diversion was performed by experienced open surgeons.

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Introduction: Small cell carcinoma of the bladder (SCCB) is a rare variant of bladder cancer with poor outcomes. We evaluated long-term outcomes of nonmetastatic (M0) and metastatic (M1) SCCB and correlated pathologic response with genomic alterations of patients treated with neoadjuvant chemotherapy (NAC).

Patients And Methods: Clinical history and pathology samples from SCCB patients diagnosed at our institution were reviewed.

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Objectives: Urachal carcinomas (UrC) are rare non-urothelial bladder neoplasms, however the potential role for MR imaging in UrC has not been well established. Our objective was to assess the value of magnetic resonance imaging (MRI) in primary and recurrent UrC.

Methods And Materials: This retrospective single-center study included all patients with UrC that underwent MRI between January 2005 and May 2020.

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Purpose: Neoadjuvant gemcitabine and cisplatin (GC) followed by radical cystectomy (RC) is standard for patients with muscle-invasive bladder cancer (MIBC). On the basis of the activity of atezolizumab (A) in metastatic BC, we tested neoadjuvant GC plus A for MIBC.

Methods: Eligible patients with MIBC (cT2-T4aN0M0) received a dose of A, followed 2 weeks later by GC plus A every 21 days for four cycles followed 3 weeks later by a dose of A before RC.

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Article Synopsis
  • Plasmacytoid urothelial carcinomas (PUC) are rare and aggressive bladder cancers with unclear MRI characteristics; this study aimed to clarify these features and their impact on patient survival.* -
  • The analysis involved 41 patients whose MRI scans were reviewed; findings showed that most tumors were large and diffuse, often with signs of muscle invasion and local spread, which correlated with worse survival outcomes.* -
  • Key survival factors included tumor size, diffuse growth, presence of extravesical extension, pelvic spread, and hydronephrosis, indicating that aggressive features on MRI are linked to decreased patient survival.*
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Radical cystectomy is the standard of care for patients with nonmetastatic high-risk bladder cancer. Robotic approach to radical cystectomy has been developed to reduce perioperative morbidities and enhance postoperative recovery while maintaining oncologic control. Classically, radical cystectomy in female patient entails anterior pelvic exenteration with removal of the bladder, uterus, fallopian tubes, ovaries, anterior vaginal wall, and urethra.

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Purpose: Evaluation of surgical competency has important implications for training new surgeons, accreditation, and improving patient outcomes. A method to specifically evaluate dissection performance does not yet exist. This project aimed to design a tool to assess surgical dissection quality.

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Objective: To evaluate whether urothelial carcinoma (UC) with sarcomatoid differentiation is associated with a lower pathological response rate to neoadjuvant chemotherapy (NAC) and worse oncological outcomes compared to UC without variant histology among patients undergoing radical cystectomy.

Patients And Methods: Patients with UC undergoing cystectomy from 1995 to 2018 at the Memorial Sloan Kettering Cancer Centre were identified. Patients with sarcomatoid differentiation at transurethral resection (TUR) or cystectomy, and patients without variant histology were selected.

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