Publications by authors named "Arjun Nathan"

Introduction: Haematuria contributes significantly to emergency urology admissions with over 4 per 1000 annual UK emergency admissions and 10% readmitted within 30 days. However, there is limited focus on optimising inpatient pathways internationally. Existing studies highlight a substantial underlying malignancy rate (32%) in patients presenting with visible haematuria, yet many receive inconsistent care, leading to prolonged hospital stays and increased resource use.

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Background: To evaluate surgical and cancer-control outcome differences in robotic salvage radical prostatectomy (s-RARP) patients after primary prostate cancer treatment with radiation (RT) versus focal therapy (FT).

Methods: The Junior ERUS/Young Academic Urologist Working Group Robotics in Urology conducted a multicentric project to investigate biochemical recurrence-free (BCR), metastases-free (MFS) and overall survival outcomes in s-RARP patients primarily treated with RT versus FT.

Results: Overall, 439 s-RARP patients qualified for analyses, of which 54% initially received RT with a median time interval between primary cancer treatment and s-RARP of 48 months.

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Background And Objective: Uncertainty regarding the diagnostic accuracy of ultrasound for testicular torsion (TT) and a lack of high-level evidence to inform international guidelines have led to significant global variation in its use. The objective of this study was to assess the diagnostic accuracy of ultrasound for TT.

Methods: This systematic review was undertaken in accordance with the Cochrane Handbook for Systematic Reviews of Diagnostic Test Accuracy.

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Purpose: Surgical features associated with better cancer-control outcomes are under investigation for salvage radical prostatectomy patients undergoing robotic approaches.

Methods: The Junior ERUS/Young Academic Urologist Working Group in Robotics in Urology conducted a multicentric project to investigate the effect of lymph node dissection (LND) and pN stage on biochemical recurrence-free (BCR), metastases-free (MFS) and overall survival (OS) outcomes in 444 robotic salvage radical prostatectomy (s-RARP) patients.

Results: Of all patients, 63% underwent LND with a median of eight removed lymph nodes.

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Background And Objective: Salvage robotic-assisted radical prostatectomy (S-RARP) is one option for treating patients with recurrent prostate cancer after prostate-preserving primary therapy. However, the tissue damage, anatomical distortion, and lack of surgical landmarks caused by the primary treatment still constitute a major challenge to surgeons. We aim to report the experience of our group on S-RARP.

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Objective: Unscheduled admission for haematuria accounts for 15% of all urological emergencies with over 25 000 patients admitted each year in the UK. It is associated with prolonged admission and poor clinical outcomes. This systematic review aims to determine current management strategies and outcomes in these patients.

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Objectives: The objective of this study is to compare the early oncological outcomes of delayed (>90 days) versus scheduled (≤90 days) radical prostatectomy (RP).

Patients And Methods: Patients with prostate cancer due to undergo surgery between March 2020 and June 2020 who were enrolled in the COVIDSurg-Cancer international, observational study were prospectively followed up for 1 year. Time to surgery was defined as the difference between the operation date and the multi-disciplinary team decision to offer surgery.

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Objective: The objective of this study was to report the 12-month oncological outcomes for patients with non-muscle-invasive bladder cancer (NMIBC) within the prospective, international COVIDSurg Cancer study.

Patients And Methods: Eligible patients were aged ≥18 years and scheduled for elective surgical management of NMIBC with curative intent (transurethral resection of bladder tumour [TURBT] or bladder biopsy) from 21 January to 14 April 2020. The primary outcome was disease recurrence within 12 months of previous elective TURBT/bladder biopsy.

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Background: The IDENTIFY study developed a model to predict urinary tract cancer using patient characteristics from a large multicentre, international cohort of patients referred with haematuria. In addition to calculating an individual's cancer risk, it proposes thresholds to stratify them into very-low-risk (<1%), low-risk (1-<5%), intermediate-risk (5-<20%), and high-risk (≥20%) groups.

Objective: To externally validate the IDENTIFY haematuria risk calculator and compare traditional regression with machine learning algorithms.

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Background: Hematuria is a cardinal symptom of urinary tract cancer and would require further investigations.

Objective: To determine the ability of renal bladder ultrasound (RBUS) with the Hematuria Cancer Risk Score (HCRS) to inform cystoscopy use in patients with hematuria.

Design, Setting, And Participants: The development cohort comprised 1984 patients with hematuria from 40 UK hospitals (DETECT 1; ClinicalTrials.

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Objectives: A national survey aimed to measure how men with prostate cancer perceived their involvement in and decisions around their care immediately after diagnosis. This study aimed to describe any differences found by socio-demographic groups.

Design: Cross-sectional study of men who were diagnosed with and treated for prostate cancer.

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WASHOUT is an international, multicentre, prospective observational study aiming to describe the management of unscheduled haematuria admissions. Preregistration can be done using the following link: https://redcap.link/WASHOUT.

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In the present study, we present comparative outcomes of radical prostatectomy after whole-gland therapy (wg-SRARP) and focal gland therapy (f-SRARP). The study assessed 339 patients who underwent salvage robot-assisted radical prostatectomy (SRARP); 145 patients who had primary focal therapy and 194 patients who had primary whole-gland treatment. SRARP was performed in all cases using a standardized technique developed at respective institutes with the da Vinci Xi Surgical System.

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We describe our experience in setting up the UK arm of the ARTS trial and highlight regulatory and funding challenges in relation to an international multicentre setting for an investigational medicinal product.

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Background High variability in prostate MRI quality might reduce accuracy in prostate cancer detection. Purpose To prospectively evaluate the quality of MRI scanners taking part in the quality control phase of the global PRIME (Prostate Imaging Using MRI ± Contrast Enhancement) trial using the Prostate Imaging Quality (PI-QUAL) standardized scoring system, give recommendations on how to improve the MRI protocols, and establish whether MRI quality could be improved by these recommendations. Materials and Methods In the prospective clinical trial (PRIME), for each scanner, centers performing prostate MRI submitted five consecutive studies and the MRI protocols (phase I).

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Objective: To report the 5-year failure-free survival (FFS) following high-intensity focused ultrasound (HIFU).

Patients And Methods: This observational cohort study used linked National Cancer Registry data, radiotherapy data, administrative hospital data and mortality records of 1381 men treated with HIFU for clinically localised prostate cancer in England. The primary outcome, FFS, was defined as freedom from local salvage treatment and cancer-specific mortality.

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Background: The unequal distribution of academic and professional outcomes between different minority groups is a pervasive issue in many fields, including surgery. The implications of differential attainment remain significant, not only for the individuals affected but also for the wider health care system. An inclusive health care system is crucial in meeting the needs of an increasingly diverse patient population, thereby leading to better outcomes.

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Background: Nonmuscle invasive bladder cancer (NMIBC) accounts for 75% of bladder cancers. It is common and costly. Cost and detriment to patient outcomes and quality of life are driven by high recurrence rates and the need for regular invasive surveillance and repeat treatments.

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Purpose There is debate about the effectiveness and toxicity of pelvic lymph node (PLN) irradiation in addition to prostate bed radiotherapy when used to treat disease recurrence following radical prostatectomy. We compared toxicity from radiation therapy (RT) to the prostate bed and pelvic lymph nodes (PBPLN-RT) with prostatebed only radiation therapy (PBO-RT) following radical prostatectomy. Methods and Materials Patients with prostate cancer who underwent post-prostatectomy RT between 2010 and 2016 were identified by using the National Prostate Cancer Audit (NPCA) database.

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Immediate access to the patient in crisis situations, such as cardiac arrest during robotic surgery, can be challenging. We aimed to present a full immersion simulation module to train robotic surgical teams to manage a crisis scenario, enhance teamwork, establish clear lines of communication, improve coordination and speed of response. Start time of cardiopulmonary resuscitation (CPR), first defibrillator shock and robotic de-docking time from the first 'cardiac arrest call' were recorded.

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