Nigel C. Cowan
Churchill Hospital
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Featured researches published by Nigel C. Cowan.
European Urology | 2010
Börje Ljungberg; Nigel C. Cowan; Damian C. Hanbury; Milan Hora; Markus A. Kuczyk; Axel S. Merseburger; Jean-Jacques Patard; Peter Mulders; Ioanel C. Sinescu
CONTEXT AND OBJECTIVES The European Association of Urology Guideline Group for renal cell carcinoma (RCC) has prepared these guidelines to help clinicians assess the current evidence-based management of RCC and to incorporate the present recommendations into daily clinical practice. EVIDENCE ACQUISITION The recommendations provided in the current updated guidelines are based on a thorough review of available RCC guidelines and review articles combined with a systematic literature search using Medline and the Cochrane Central Register of Controlled Trials. EVIDENCE SYNTHESIS A number of recent prospective randomised studies concerning RCC are now available with a high level of evidence, whereas earlier publications were based on retrospective analyses, including some larger multicentre validation studies, meta-analyses, and well-designed controlled studies. CONCLUSIONS These guidelines contain information for the treatment of an individual patient according to a current standardised general approach. Updated recommendations concerning diagnosis, treatment, and follow-up can improve the clinical handling of patients with RCC.
European Urology | 2011
Arnulf Stenzl; Nigel C. Cowan; Maria De Santis; Markus A. Kuczyk; Axel S. Merseburger; M.J. Ribal; Amir Sherif; J. Alfred Witjes
CONTEXT New data regarding treatment of muscle-invasive and metastatic bladder cancer (MiM-BC) has emerged and led to an update of the European Association of Urology (EAU) guidelines for MiM-BC. OBJECTIVE To review the new EAU guidelines for MiM-BC with a specific focus on treatment. EVIDENCE ACQUISITION New literature published since the last update of the EAU guidelines in 2008 was obtained from Medline, the Cochrane Database of Systematic Reviews, and reference lists in publications and review articles and comprehensively screened by a group of urologists, oncologists, and a radiologist appointed by the EAU Guidelines Office. Previous recommendations based on the older literature on this subject were also taken into account. Levels of evidence (LEs) and grades of recommendations (GRs) were added based on a system modified from the Oxford Centre for Evidence-based Medicine Levels of Evidence. EVIDENCE SYNTHESIS Current data demonstrate that neoadjuvant chemotherapy in conjunction with radical cystectomy (RC) is recommended in certain constellations of MiM-BC. RC remains the basic treatment of choice in localised invasive disease for both sexes. An attempt has been made to define the extent of surgery under standard conditions in both sexes. An orthotopic bladder substitute should be offered to both male and female patients lacking any contraindications, such as no tumour at the level of urethral dissection. In contrast to neoadjuvant chemotherapy, current advice recommends the use of adjuvant chemotherapy only within clinical trials. Multimodality bladder-preserving treatment in localised disease is currently regarded only as an alternative in selected, well-informed, and compliant patients for whom cystectomy is not considered for medical or personal reasons. In metastatic disease, the first-line treatment for patients fit enough to sustain cisplatin remains cisplatin-containing combination chemotherapy. With the advent of vinflunine, second-line chemotherapy has become available. CONCLUSIONS In the treatment of localised invasive bladder cancer (BCa), the standard treatment remains radical surgical removal of the bladder within standard limits, including as-yet-unspecified regional lymph nodes. However, the addition of neoadjuvant chemotherapy must be considered for certain specific patient groups. A new drug for second-line chemotherapy (vinflunine) in metastatic disease has been approved and is recommended.
European Urology | 2014
J. Alfred Witjes; Eva Comperat; Nigel C. Cowan; Maria De Santis; Georgios Gakis; Thierry Lebret; M.J. Ribal; Antoine G. van der Heijden; Amir Sherif
CONTEXT The European Association of Urology (EAU) guidelines panel on Muscle-invasive and Metastatic bladder cancer (BCa) updates its guidelines yearly. This updated summary provides a synthesis of the 2013 guidelines document, with emphasis on the latest developments. OBJECTIVE To provide graded recommendations on the diagnosis and treatment of patients with muscle-invasive BCa (MIBC), linked to a level of evidence. EVIDENCE ACQUISITION For each section of the guidelines, comprehensive literature searches covering the past 10 yr in several databases were conducted, scanned, reviewed, and discussed both within the panel and with external experts. The final results are reflected in the recommendations provided. EVIDENCE SYNTHESIS Smoking and work-related carcinogens remain the most important risk factors for BCa. Computed tomography (CT) and magnetic resonance imaging can be used for staging, although CT is preferred for pulmonary evaluation. Open radical cystectomy with an extended lymph node dissection (LND) remains the treatment of choice for treatment failures in non-MIBC and T2-T4aN0M0 BCa. For well-informed, well-selected, and compliant patients, however, multimodality treatment could be offered as an alternative, especially if cystectomy is not an option. Comorbidity, not age, should be used when deciding on radical cystectomy. Patients should be encouraged to actively participate in the decision-making process, and a continent urinary diversion should be offered to all patients unless there are specific contraindications. For fit patients, cisplatinum-based neoadjuvant chemotherapy should always be discussed, since it improves overall survival. For patients with metastatic disease, cisplatin-containing combination chemotherapy is recommended. For unfit patients, carboplatin combination chemotherapy or single agents can be used. CONCLUSIONS This 2013 EAU Muscle-invasive and Metastatic BCa guidelines updated summary aims to increase the quality of care and outcome for patients with muscle-invasive or metastatic BCa. PATIENT SUMMARY In this paper we update the EAU guidelines on Muscle-invasive and Metastatic bladder cancer. We recommend that chemotherapy be administered before radical treatment and that bladder removal be the standard of care for disease confined to the bladder.
European Urology | 2013
Morgan Rouprêt; Marko Babjuk; Eva Comperat; Richard Zigeuner; Richard Sylvester; Max Burger; Nigel C. Cowan; Andreas Böhle; Bas W.G. van Rhijn; Eero Kaasinen; Joan Palou; Shahrokh F. Shariat
CONTEXT The European Association of Urology (EAU) guideline group for upper tract urothelial carcinoma (UTUC) has prepared updated guidelines to aid clinicians in assessing the current evidence-based management of UTUC and to incorporate present recommendations into daily clinical practice. OBJECTIVE To provide a brief overview of the EAU guidelines on UTUC as an aid to clinicians in their daily clinical practice. EVIDENCE ACQUISITION The recommendations provided in the current guidelines are based on a thorough review of available UTUC guidelines and articles identified using a systematic search of Medline. Data on urothelial malignancies and UTUCs in the literature were searched using Medline with the following keywords: urinary tract cancer; urothelial carcinomas; upper urinary tract, carcinoma; renal pelvis; ureter; bladder cancer; chemotherapy; nephroureterectomy; adjuvant treatment; instillation; neoadjuvant treatment; recurrence; risk factors; nomogram; and survival. References were weighted by a panel of experts. EVIDENCE SYNTHESIS There is a lack of data in the current literature to provide strong recommendations (ie, grade A) due to the rarity of the disease. A number of recent multicentre studies are now available, and there is a growing interest in UTUC in the recent literature. Overall, 135 references have been included here, but most of these studies are still retrospective analyses. The TNM 2009 classification is recommended. Recommendations are given for diagnosis as well as radical and conservative treatment (ie, imperative and elective cases); additionally, prognostic factors are discussed. Recommendations are also provided for patient follow-up after different therapeutic options. CONCLUSIONS These guidelines contain information for the management of individual patients according to a current standardised approach. Physicians must take into account the specific clinical characteristics of each individual patient when determining the optimal treatment regimen including tumour location, grade, and stage; renal function; molecular marker status; and medical comorbidities.
European Urology | 2009
Arnulf Stenzl; Nigel C. Cowan; Maria De Santis; G. Jakse; Marcus A. Kuczyk; Axel S. Merseburger; M.J. Ribal; Amir Sherif; J. Alfred Witjes
CONTEXT New data regarding diagnosis and treatment of muscle-invasive and metastatic bladder cancer (MiM-BC) has emerged and led to an update of the European Association of Urology (EAU) guidelines for MiM-BC. OBJECTIVE To review the new EAU guidelines for MiM-BC. EVIDENCE ACQUISITION A comprehensive workup of the literature obtained from Medline, the Cochrane central register of systematic reviews, and reference lists in publications and review articles was developed and screened by a group of urologists, oncologists, and radiologist appointed by the EAU Guideline Committee. Previous recommendations based on the older literature on this subject were taken into account. Levels of evidence and grade of guideline recommendations were added, modified from the Oxford Centre for Evidence-based Medicine Levels of Evidence. EVIDENCE SYNTHESIS The diagnosis of muscle-invasive bladder cancer (BCa) is made by transurethral resection (TUR) and following histopathologic evaluation. Patients with confirmed muscle-invasive BCa should be staged by computed tomography (CT) scans of the chest, abdomen, and pelvis, if available. Adjuvant chemotherapy is currently only advised within clinical trials. Radical cystectomy (RC) is the treatment of choice for both sexes, and lymph node dissection should be an integral part of cystectomy. An orthotopic bladder substitute should be offered to both male and female patients lacking any contraindications, such as no tumour at the level of urethral dissection. Multimodality bladder-preserving treatment in localised disease is currently regarded only as an alternative in selected, well-informed, and compliant patients for whom cystectomy is not considered for clinical or personal reasons. An appropriate schedule for disease monitoring should be based on (1) natural timing of recurrence, (2) probability of disease recurrence, (3) functional deterioration at particular sites, and (4) consideration of treatment of a recurrence. In metastatic disease, the first-line treatment for patients fit enough to sustain cisplatin is cisplatin-containing combination chemotherapy. Presently, there is no standard second-line chemotherapy. CONCLUSIONS These EAU guidelines are a short, comprehensive overview of the updated guidelines of (MiM-BC) as recently published in the EAU guidelines and also available in the National Guideline Clearinghouse.
European Urology | 2015
Morgan Rouprêt; Marko Babjuk; Eva Comperat; Richard Zigeuner; Richard Sylvester; Maximilian Burger; Nigel C. Cowan; Andreas Böhle; Bas W.G. van Rhijn; Eero Kaasinen; Joan Palou; Shahrokh F. Shariat
CONTEXT The European Association of Urology (EAU) guidelines panel on upper urinary tract urothelial cell carcinoma (UTUC) has prepared updated guidelines to aid clinicians in the current evidence-based management of UTUC and to incorporate recommendations into clinical practice. OBJECTIVE To provide a brief overview of the EAU guidelines on UTUC as an aid to clinicians. EVIDENCE ACQUISITION The recommendations provided in the current guidelines are based on a thorough review of available UTUC guidelines and articles identified following a systematic search of Medline. Data on urothelial malignancies and UTUC were searched using these keywords: urinary tract cancer; urothelial carcinomas; upper urinary tract, carcinoma; renal pelvis; ureter; bladder cancer; chemotherapy; nephroureterectomy; adjuvant treatment; instillation; neoadjuvant treatment; recurrence; risk factors; and survival. References were weighted by a panel of experts. EVIDENCE SYNTHESIS Due to the rarity of UTUC, there are insufficient data to provide strong recommendations (ie, grade A). However, the results of recent multicentre studies are now available, and there is a growing interest in UTUC. The 2009 TNM classification is recommended. Recommendations are given for diagnosis and risk stratification as well as radical and conservative treatment, and prognostic factors are discussed. A single postoperative dose of intravesical mitomycin after nephroureterectomy reduces the risk of bladder tumour recurrence. Recommendations are also provided for patient follow-up after different therapeutic strategies. CONCLUSIONS These guidelines contain information on the management of individual patients according to a current standardised approach. Urologists should take into account the specific clinical characteristics of each patient when determining the optimal treatment regimen, based on the proposed risk stratification of these tumours. PATIENT SUMMARY Urothelial carcinoma of the upper urinary tract is rare, but because 60% of these tumours are invasive at diagnosis, an appropriate diagnosis is most important. A number of known risk factors exist.
European Urology | 2017
J. Alfred Witjes; Thierry Lebret; Eva Comperat; Nigel C. Cowan; Maria De Santis; Harman Maxim Bruins; V. Hernández; Estefanía Linares Espinós; James Dunn; Mathieu Rouanne; Yann Neuzillet; Erik Veskimäe; Antoine G. van der Heijden; Georgios Gakis; M.J. Ribal
CONTEXT Invasive bladder cancer is a frequently occurring disease with a high mortality rate despite optimal treatment. The European Association of Urology (EAU) Muscle-invasive and Metastatic Bladder Cancer (MIBC) Guidelines are updated yearly and provides information to optimise diagnosis, treatment, and follow-up of this patient population. OBJECTIVE To provide a summary of the EAU guidelines for physicians and patients confronted with muscle-invasive and metastatic bladder cancer. EVIDENCE ACQUISITION An international multidisciplinary panel of bladder cancer experts reviewed and discussed the results of a comprehensive literature search of several databases covering all sections of the guidelines. The panel defined levels of evidence and grades of recommendation according to an established classification system. EVIDENCE SYNTHESIS Epidemiology and aetiology of bladder cancer are discussed. The proper diagnostic pathway, including demands for pathology and imaging, is outlined. Several treatment options, including bladder-sparing treatments and combinations of treatment modalities (different forms of surgery, radiation therapy, and chemotherapy) are described. Sequencing of these modalities is discussed. Potential indications and contraindications, such as comorbidity, are related to treatment choice. There is a new paragraph on organ-sparing approaches, both in men and in women, and on minimal invasive surgery. Recommendations for chemotherapy in fit and unfit patients are provided including second-line options. Finally, a follow-up schedule is provided. CONCLUSIONS The current summary of the EAU Muscle-invasive and Metastatic Bladder Cancer Guidelines provides an up-to-date overview of the available literature and evidence dealing with diagnosis, treatment, and follow-up of patients with metastatic and muscle-invasive bladder cancer. PATIENT SUMMARY Bladder cancer is an important disease with a high mortality rate. These updated guidelines help clinicians refine the diagnosis and select the appropriate therapy and follow-up for patients with metastatic and muscle-invasive bladder cancer.
European Radiology | 2008
Aart J. van der Molen; Nigel C. Cowan; Ullrich G. Mueller-Lisse; Claus Nolte-Ernsting; Satoru Takahashi; Richard H. Cohan
The aim was to develop clinical guidelines for multidetector computed tomography urography (CTU) by a group of experts from the European Society of Urogenital Radiology (ESUR). Peer-reviewed papers and reviews were systematically scrutinized. A summary document was produced and discussed at the ESUR 2006 and ECR 2007 meetings with the goal to reach consensus. True evidence-based guidelines could not be formulated, but expert guidelines on indications and CTU examination technique were produced. CTU is justified as a first-line test for patients with macroscopic haematuria, at high-risk for urothelial cancer. Otherwise, CTU may be used as a problem-solving examination. A differential approach using a one-, two- or three-phase protocol is proposed, whereby the clinical indication and the patient population will determine which CTU protocol is employed. Either a combined nephrographic-excretory phase following a split-bolus intravenous injection of contrast medium, or separate nephrographic and excretory phases following a single-bolus injection can be used. Lower dose (CTDIvol 5–6 mGy) is used for benign conditions and normal dose (CTDIvol 9–12 mGy) for potential malignant disease. A low-dose (CTDIvol 2–3 mGy) unenhanced series can be added on indication. The expert-based CTU guidelines provide recommendations to optimize techniques and to unify the radiologist’s approach to CTU.
European Radiology | 2006
C. Nolte-Ernsting; Nigel C. Cowan
CT urography has emerged as a serious alternative to conventional urography by utilizing the advantages of modern multislice CT techniques for the visualization of the entire upper urinary tract. Several different examination techniques have been developed in multislice CT (MSCT) urography for improving the opacification and distension of the urinary tract. All efforts in performing MSCT urography have to compromise between the best possible image quality and a reasonably low radiation exposure. Initial low-dose examination protocols are already available. Operating modern MSCT urography properly is not difficult, but it presupposes basic knowledge on the variety of current MSCT urography techniques, including such issues as present-day indications, split-bolus injection, compression, saline infusion, low-dose diuretic administration, hybrid scanning, timing of the acquisition delay, examination protocols, postprocessing, image analysis, and radiation exposure. This article is not intended to provide guidelines of how to conduct MSCT urography, but everyone will be able to understand the functionality of several robust operating MSCT urography techniques, which helps making an individual selection for the clinical practice. In the near future, systematic studies are awaited evaluating the morphologic and diagnostic accuracy of MSCT urography regarding diverse urinary tract disorders.
BJUI | 2007
Nigel C. Cowan; Ben W. Turney; Nia J. Taylor; Catherine L. McCarthy; Jeremy P. Crew
To evaluate multidetector computed tomography urography (MDCTU) for diagnosing upper urinary tract (UUT) urothelial tumour by comparison with retrograde ureteropyelography (RUP).