Publications by authors named "Guru K"

Article Synopsis
  • The study investigates the relationship between tumors in the trigone/urethra (T/U) area of the bladder and various cancer outcomes in patients who had robot-assisted radical cystectomy (RARC).
  • Out of 608 patients, 191 (31%) had tumors in the T/U, which were linked to more advanced tumor stages, higher rates of positive surgical margins, and increased need for salvage chemotherapy.
  • Overall, the findings suggest that T/U tumor involvement significantly raises the risk of cancer recurrence and cancer-specific deaths, highlighting the need for careful monitoring in these patients.
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Objective: We described the technique and outcomes of robot-assisted repair of uretero-enteric strictures (UES) following robot-assisted radical cystectomy (RARC) and urinary diversion.

Methods: Retrospective review of our RARC database from November 2005 to August 2023 at Roswell Park Comprehensive Cancer center was performed. Patients who developed UES and ultimately underwent robot-assisted uretero-enteric reimplantation (RUER) were identified.

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Robot-assisted radical nephroureterectomy (RANU) has emerged as a valid alternative to open or laparoscopic nephroureterectomy in recent years. However, different types of robotic platforms can limit surgical maneuvers in various ways. This study aimed to describe the surgical procedure and demonstrate RANU's technical feasibility and safety using the Hugo robot-assisted surgery (RAS) system.

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Objective: To describe the management and outcomes of patients with Ta predominantly low-grade urothelial carcinoma with focal high-grade features (FHG) (<5%), compared to those with Ta low grade (LG) and Ta high grade (HG).

Methods: Retrospective review of all patients who underwent transurethral resection of bladder tumor between 2005 and 2023. Patients with Ta disease were identified and categorized into LG, FHG, and HG.

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Introduction: We aimed to investigate the differences in perioperative outcomes, especially ureteroenteric strictures, between patients who underwent a stented ureteroenteric anastomosis at the time of robot-assisted radical cystectomy (RARC) and ileal conduit vs those who did not.

Methods: A retrospective review of our RARC database was performed (2009-2023). Patients were divided into those who received stented ureteroenteric anastomosis vs those who did not.

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Article Synopsis
  • * Recent updates to the NCCN Guidelines for Bladder Cancer reflect changes from the fifth edition of the WHO Classification of Tumours, ensuring alignment with new standards.
  • * The guidelines also introduce new treatment options for NMIBC that doesn't respond to bacillus Calmette-Guérin (BCG) therapy and provide updated recommendations for systemic therapy targeting advanced or metastatic bladder cancer.
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Objective: To assess the role of neoadjuvant chemotherapy (NAC) before robot-assisted radical cystectomy (RARC) for patients with variant histology (VH) muscle-invasive bladder cancer (MIBC).

Methods: Retrospective review of 988 patients who underwent RARC (2004-2023) for MIBC. Primary outcomes included the utilization of NAC among this cohort of patients, frequency of downstaging, and discordance between preoperative and final pathology in terms of the presence of VH.

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Article Synopsis
  • The study focused on older patients with muscle-invasive bladder cancer who were not eligible for traditional chemotherapy due to health issues, assessing the combination of nivolumab (an immune checkpoint inhibitor) and radiation therapy.
  • Twenty patients, primarily aged over 70, were treated, revealing that nearly half remained progression-free after 12 months and had median progression-free survival of 11.4 months.
  • While the treatment was tolerable for patients with multiple comorbidities, it showed limited effectiveness in improving outcomes for this older population.
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Introduction: We sought to investigate the impact of National Comprehensive Cancer Network (NCCN)-compliant multidisciplinary conference on the uptake of active surveillance (AS) among eligible patients with prostate cancer.

Methods: Retrospective review of our AS database was performed. Patients who are eligible for AS who sought a second opinion at a comprehensive cancer center (2010-2021) were presented to the multidisciplinary Localized Prostate Cancer Conference (LPCC) that includes urologists, radiation oncologists, pathologists, and patient advocates.

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Surgical fields, especially urology, have shifted increasingly toward the use of artificial intelligence (AI). Advancements in AI have created massive improvements in diagnostics, outcome predictions, and robotic surgery. For robotic surgery to progress from assisting surgeons to eventually reaching autonomous procedures, there must be advancements in machine learning, natural language processing, and computer vision.

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Introduction: We sought to investigate the change in the urinary microbiome profile after transurethral resection of bladder tumor (TURBT).

Methods: Urine specimens were collected from consecutive patients with bladder cancer. Patients were divided into those with bladder tumors ("Tumor group": de novo tumors or recurrent/progressed after TURBT ± intravesical therapy) versus those without evidence of recurrence after treatment "No Recurrent Tumor group".

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Current treatment for prostate cancer is dependent on the stages of the cancer, recurrence, and genetic factors. Treatment varies from active surveillance or watchful waiting to prostatectomy, chemotherapy, and radiation therapy in combination or alone. Although radical prostate cancer therapy reduces the advancement of the disease and its mortality, the increased disease treatment associated morbidity, erectile dysfunction, and incontinence affect the quality of life of cancer survivors.

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Purpose: We aimed to evaluate the impact of testosterone replacement therapy (TRT) in patients with localized prostate cancer (CaP) who elected active surveillance (AS).

Methods: A retrospective review of our CaP database was performed. Patients who received TRT while on AS were identified and were matched to a cohort of patient on AS while not on TRT (1:3) using propensity score matching.

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Objective: To develop and validate a nomogram to improve the specificity of prostate imaging reporting and data system (PI-RADS) on multiparametric magnetic resonance imaging (MRI) for clinically significant prostate cancer on targeted fusion biopsy.

Methods: A retrospective review of patients who underwent fusion biopsy for PI-RADS 3-5 lesions using UroNav and Artemis systems between 2016 and 2022 was performed. Patients were divided into those with CS disease on fusion biopsy (Gleason grade group ≥2) versus those without.

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Article Synopsis
  • The review compares recovery, oncological outcomes, and quality of life between open radical cystectomy (ORC) and robot-assisted radical cystectomy (RARC) for bladder cancer patients from randomized trials.
  • RARC shows shorter hospital stays and similar complication rates compared to ORC, but ORC has shorter operative times and higher rates of blood loss and transfusions.
  • RARC improves physical and role functioning but does not significantly enhance overall quality of life or survival rates, suggesting it may be preferable for patients wanting to minimize blood transfusions and hospital stays.
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Background: We sought to investigate the impact of an NCCN-compliant multidisciplinary conference on treatment decisions of patients with localized prostate cancer.

Methods: A retrospective review of our quality assurance localized prostate cancer database was performed. All patients with localized prostate cancer who sought a second opinion at Roswell Park Comprehensive Cancer Center between 2009 and 2019 were presented to the multidisciplinary Localized Prostate Cancer Conference (LPCC) that includes urologists, radiation oncologists, pathologists, and patient advocates.

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Background: Data on Ta low-grade (LG) non-muscle invasive bladder cancer (NMIBC) have shown that follow-up cystoscopies are normal in 82% and 67% of patients with single and multiple tumors, respectively.

Objective: To develop a predictive model associated with recurrence-free survival (RFS) at 6, 12, 18 and 24 months in TaLG cases that consider the patients' risk aversion.

Materials And Methods: Data from a prospectively maintained database of 202 newly diagnosed TaLG NMIBC patients treated at Scandinavian institutions were used for the analysis.

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Article Synopsis
  • * In the study, 71% of patients receiving NAI plus BCG achieved complete responses (CRs), with a median duration of over 26 months, suggesting that this combination is effective in prolonging patient remission and avoiding surgical procedures like cystectomy.
  • * The results show a 55.4% disease-free survival rate at 12 months for a different subgroup treated with NAI plus BCG, while the majority of side effects were mild,
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Many studies are currently investigating the association between the urinary microbiome and bladder cancer, focusing on differences between stages and with risk of recurrence and progression. However, many of these studies are limited by the small number of patients, presence of confounders and issues with sampling, DNA extraction, and analyses. Recently there has been a shift toward examining the microbiome of bladder tissues rather than urine samples; however, these studies remain a minority.

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Introduction: To evaluate the prevalence, predictors, management, and trends for ureteroenteric strictures (UES) after robot-assisted radical cystectomy (RARC).

Methods: Retrospective review of our RARC database was performed (2005-2022). UES was described in terms of timing, laterality, and management.

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Objective: To identify trends in complications following robot-assisted radical cystectomy (RARC) using a multi-institutional database, the International Robotic Cystectomy Consortium (IRCC).

Methods: A retrospective review of the IRCC database was performed (2976 patients, 26 institutions from 11 countries). Postoperative complications were categorized as overall or high grade (≥ Clavien Dindo III) and were further categorized based on type/organ site.

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The NCCN Guidelines for Bladder Cancer provide recommendations for the diagnosis, evaluation, treatment, and follow-up of patients with bladder cancer and other urinary tract cancers (upper tract tumors, urothelial carcinoma of the prostate, primary carcinoma of the urethra). These NCCN Guidelines Insights summarize the panel discussion behind recent important updates to the guidelines regarding the treatment of non-muscle-invasive bladder cancer, including how to treat in the event of a bacillus Calmette-Guérin (BCG) shortage; new roles for immune checkpoint inhibitors in non-muscle invasive, muscle-invasive, and metastatic bladder cancer; and the addition of antibody-drug conjugates for metastatic bladder cancer.

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We sought to describe the development of the robotic urology program at Sindh Institute of Urology and Transplantation (SIUT) and the feasibility of transitioning from the da Vinci to Versius robotic systems. The SIUT robotics program began in 2017 utilizing the da Vinci Si robotic system, transitioning to the Versius system in 2021. Retrospective review of our quality assurance database was performed.

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Objectives: To investigate the oncologic outcomes of pT0 after robot-assisted radical cystectomy (RARC).

Methods: A retrospective review of the International Robotic Cystectomy Consortium database was performed. Patients with pT0 after RARC were identified and analyzed.

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