Publications by authors named "Ben-David R"

Objective: To assess 30- and 90-day postoperative complication rates in patients who underwent robot-assisted radical cystectomy (RARC) after receiving novel immunotherapy-based neoadjuvant treatment.

Methods: A bi-centre analysis was conducted in patients who underwent RARC with intracorporeal urinary diversion and who received an immunotherapy-based neoadjuvant regimen between 2017 and 2023. Complications were classified using the Clavien-Dindo system.

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Epithelial-mesenchymal transition (EMT) is a dynamic process of lineage plasticity in which epithelial cancer cells acquire mesenchymal traits, enabling them to metastasize to distant organs. This review explores the current understanding of how lineage plasticity and phenotypic reprogramming drive prostate cancer progression to lethal stages, contribute to therapeutic resistance, and highlight strategies to overcome the EMT phenotype within the prostate tumor microenvironment (TME). Emerging evidence reveals that prostate tumor cells can undergo lineage switching, adopting alternative growth pathways in response to anti-androgen therapies and taxane-based chemotherapy.

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Article Synopsis
  • - The study examined clinical features and outcomes of patients admitted for diabetic ketoacidosis (DKA) outside of internal medicine from 2005 to 2022, focusing on differences between internal and non-internal medicine cases.
  • - Among 429 patients, those outside of internal medicine were generally older and had higher rates of diabetes complications, with poorer outcomes such as lower glucose levels and increased need for mechanical ventilation.
  • - The findings suggest that patients admitted for surgical or obstetrical conditions are at a higher risk for severe DKA complications, necessitating further research to understand these unique patient characteristics better.
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Objective: To assess recurrence-free survival (RFS) in patients with undetectable tumour-informed circulating tumour DNA (ctDNA) before radical cystectomy (RC) and evaluate if those who converted from detectable to undetectable ctDNA status after RC have similar RFS outcomes as those with persistently undetectable ctDNA status.

Patients And Methods: Patients who underwent RC had prospectively and longitudinally collected tumour-informed ctDNA analyses during 2021-2023. ctDNA status was informed from the pre-RC specimen.

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  • * The survey had a 28.6% completion rate with 201 responses, revealing that while about half of the institutions using SP platforms have done so for over 2 years, structured training is limited, leading to concerns about hands-on experience and the learning curve associated with SP procedures.
  • * Despite recognizing the clinical benefits of SP surgery, many trainees do not view proficiency in it as essential for career advancement; however, predictors of future SP implementation include academic aspirations and the availability of SP platforms
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  • A study assessed the trends in various vasculitis conditions in Israel from 2007 to 2021, particularly during the COVID-19 pandemic.
  • The incidence rates of giant cell arteritis, IgA vasculitis, and Behcet's disease significantly decreased over the years, while Takayasu, ANCA-associated vasculitis, and cryoglobulinemia showed no changes.
  • The COVID-19 pandemic had no impact on the incidence rates of any of the examined vasculitides, suggesting that future research should explore environmental factors influencing these trends.
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  • Rheumatic paraneoplastic syndromes are uncommon but can indicate hidden cancers, often appearing within two years before a cancer diagnosis.
  • An 18-year-old female with no prior health issues developed morning stiffness and a rash, leading to a diagnosis of systemic lupus erythematosus (SLE) and later the discovery of a dysgerminoma tumor.
  • After surgery and chemotherapy for the tumor, her SLE symptoms went into remission, highlighting the need for doctors to consider cancer when patients show unexplained lupus symptoms.
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Purpose: Understanding the specific tumor characteristics associated with detectable circulating tumor DNA (ctDNA) in patients with renal cell carcinoma (RCC) is critical for informing future studies aiming to establish the clinical utility of such testing. We characterized the pathologic and clinical features associated with preoperatively detectable ctDNA in patients with renal masses suspicious for RCC.

Methods: Consecutive patients who underwent partial or radical nephrectomy for nonmetastatic suspected RCC (cT1b-T3) during 2022-2023 had prospectively collected tumor-informed ctDNA analyses conducted preoperatively and postoperatively.

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Background And Objective: Sequential intravesical gemcitabine/docetaxel (Gem/Doce) has emerged as a potential alternative to bacillus Calmette-Guérin (BCG) for the treatment of non-muscle-invasive bladder cancer (NMIBC). Our aim was to determine the comparative effectiveness of BCG and Gem/Doce for patients with intermediate-risk (IR) NMIBC, composed mainly of high-grade (HG) Ta disease.

Methods: Patients with IR-NMIBC who received either BCG or Gem/Doce during 2013-2023 were included.

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Background And Objective: Neoadjuvant therapy followed by radical cystectomy with lymphadenectomy remains the gold standard of treatment in patients with muscle-invasive bladder cancer. Pathologically positive lymph node (pN+) disease is known to convey a poor prognosis. Tumor-informed circulating tumor DNA (ctDNA) has emerged as a possible novel prognostic biomarker in the field.

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Objective: To analyse surgical, functional, and mid-term oncological outcomes of robot-assisted nephroureterectomy (RANU) in a contemporary large multi-institutional setting.

Patients And Methods: Data were retrieved from the ROBotic surgery for Upper tract Urothelial cancer STtudy (ROBUUST) 2.0 database, an international, multicentre registry encompassing data of patients with upper urinary tract urothelial carcinoma undergoing curative surgery between 2015 and 2022.

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Purpose Of Review: Tumor-informed circulating tumor DNA (ctDNA) is an emerging biomarker in urothelial carcinoma. Recent clinical trials have investigated the integration of ctDNA into clinical decision-making in patients with muscle-invasive bladder cancer, their findings suggest that ctDNA may potentially revolutionize the way we stratify patients to different treatment modalities.

Recent Findings: ctDNA informed from TURBT specimens was found to be prognostic of disease outcomes among patients with localized nonmetastatic bladder cancer.

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In light of the changing climate that jeopardizes future food security, genomic selection is emerging as a valuable tool for breeders to enhance genetic gains and introduce high-yielding varieties. However, predicting grain yield is challenging due to the genetic and physiological complexities involved and the effect of genetic-by-environment interactions on prediction accuracy. We utilized a chained model approach to address these challenges, breaking down the complex prediction task into simpler steps.

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Introduction: Wheat grain filling processes under post-anthesis stress scenarios depend mainly on stem traits and remobilization of stem water-soluble carbohydrates (WSC).

Methods: A diverse panel of advanced semi-dwarf spring wheat lines, representing a natural variation in stem traits (WSC content, stem diameter, peduncle length, and stem wall width), was used to identify specific traits that reliably reflect the relationship between WSC and grain yield. The panel was phenotyped under various environmental conditions: well-watered, water-limited, and heat stress in Mexico, and terminal-drought in Israel.

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Background: The role of kidney-sparing surgery in patients with high-risk upper urinary tract urothelial carcinoma is controversial. The present study aimed to assess oncological and functional outcomes of robot-assisted distal ureterectomy in patients with high-risk distal ureteral tumors.

Methods: The ROBUUST 2.

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Background: Diabetic ketoacidosis (DKA) is an acute metabolic, life-threatening complication of diabetes mellitus with a mortality rate that now stand at less than 1%. Although mortality is coupled with the etiology of DKA, literature on the influence of DKA etiology on patient outcome is scarce.

Objectives: To study different triggers for DKA and their effect on outcomes.

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Background: Diagnostic ureteroscopy (URS) with or without biopsy remains a subject of contention in the management of upper tract urothelial carcinoma (UTUC), with varying recommendations across different guidelines. The study aims to analyse the decision-making and prognostic role of diagnostic ureteroscopy (URS) in high-risk UTUC patients undergoing curative surgery.

Materials And Methods: In this retrospective multi-institutional analysis of high-risk UTUC patients from the ROBUUST dataset, a comparison between patients who received or not preoperative URS and biopsy before curative surgery was carried out.

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Introduction: The combination of sequential intravesical gemcitabine and docetaxel (Gem/Doce) chemotherapy has been considered a feasible option for BCG (Bacillus Calmette-Guérin) treatment in non-muscle invasive bladder cancer (NMIBC), gaining popularity during BCG shortage period. We seek to determine the efficacy of the treatment by comparing Gem/Doce induction alone vs induction with maintenance, and to evaluate the treatment outcomes of two different dosage protocols.

Methods: A bi-center retrospective analysis of consecutive patients treated with Gem/Doce for NMIBC between 2018 and 2023 was performed.

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The pursuit of surgeons and oncologists in fulfilling the inherent desire of patients to retain their urinary bladder despite having muscle-invasive bladder cancer (MIBC) has sparked years of research and multiple debates, given its aggressive nature and the high risk of fatal metastatic recurrence. Historically, several approaches to bladder-sparing treatment have been explored, ranging from radical transurethral resection to concurrent chemoradiation. A less well-established approach involves a risk-adapted approach with local therapy deferred based on the clinical response to transurethral resection followed by systemic therapy.

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Introduction: The objective of this study was to stratify preoperative immune cell counts by cancer specific outcomes in patients with renal cell carcinoma (RCC) and a tumor thrombus after radical nephrectomy with tumor thrombectomy.

Methods: Patients with a diagnosis of RCC with tumor thrombus that underwent radical nephrectomy with thrombectomy across an international consortium of seven institutions were included. Patients who were metastatic at diagnosis and those who received preoperative medical treatment were also included.

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Background: Robotic-assisted radical cystectomy (RARC) offers decreased blood loss during surgery, shorter hospital length of stay, and lower risk for thromboembolic events without hindering oncological outcomes. Cutaneous ureterostomies (UCS) are a seldom utilized diversion that can be a suitable alternative for a selected group of patients with competing co-morbidities and limited life expectancy.

Objective: To describe operative and perioperative characteristics as well as oncological outcomes for patients that underwent RARC + UCS.

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Background And Objective: Prostate-specific antigen (PSA) remains a critical marker for prostate cancer (PCa) detection and monitoring. Recognising historical variability in PSA assays and the evolution of assay technology and calibration, this study aims to reassess interassay variability using the latest generation of five assays in a contemporary cohort of men undergoing prostate biopsy.

Methods: Five different commercially available PSA assays were tested in a blood sample of 76 men before undergoing a prostate biopsy.

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Background And Objective: Decision-making on the use of neoadjuvant and adjuvant treatment for patients with bladder cancer undergoing radical cystectomy (RC) currently depends on assessment of clinical and pathological features, which lack sensitivity. Circulating tumor DNA (ctDNA) has emerged as a possible novel prognostic biomarker in the field. Our aim was to assess whether ctDNA status before RC is predictive of pathological and oncological outcomes.

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Bladder cancer is a heterogeneous disease. Treatment decisions are mostly decided based on disease stage (non-muscle invasive or muscle invasive). Patients with muscle-invasive disease will be offered a radical treatment combined with systemic therapy, while in those with non-muscle-invasive disease, an attempt to resect the tumor endoscopically will usually be followed by different intravesical instillations.

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Introduction: The extensive heterogeneity of prostate cancer (PCa) and multilayered complexity of progression to castration-resistant prostate cancer (CRPC) have contributed to the challenges of accurately monitoring advanced disease. Profiling of the tumor microenvironment with large-scale transcriptomic studies have identified gene signatures that predict biochemical recurrence, lymph node invasion, metastases, and development of therapeutic resistance through critical determinants driving CRPC.

Areas Covered: This review encompasses understanding of the role of different molecular determinants of PCa progression to lethal disease including the phenotypic dynamic of cell plasticity, EMT-MET interconversion, and signaling-pathways driving PCa cells to advance and metastasize.

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