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1.
Urol Int ; 96(1): 32-8, 2016.
Artículo en Inglés | MEDLINE | ID: mdl-25924623

RESUMEN

INTRODUCTION: We aim to review the outcomes of micropapillary urothelial carcinoma (MPUC) of the bladder from a single institution. The hypothesis is that non-muscle-invasive (NMI) MPUC may have a heterogeneous prognosis, and detailed pathological analysis may identify patients that could be managed without immediate cystectomy. PATIENTS AND METHODS: This is a retrospective analysis of patients presenting with MPUC in a primary transurethral resection specimen (n = 40). The pattern of micropapillary (MP) differentiation [surface/non-invasive (sMP) or invasive (iMP)], extent of MP differentiation and lymphovascular invasion (LVI) were correlated with overall survival (OS), recurrence-free survival and upstaging at re-resection. RESULTS: Sixteen of 40 patients died after a median follow-up of 37 months. Tumour stage was strongly predictive of OS (p < 0.0001). LVI was associated with increased mortality (hazard ratio 12.4, 95% CI: 3.5-44.5, p = 0.0001), higher pathological stage (p = 0.001), lymph node involvement (p = 0.001) and iMP differentiation (p = 0.006). In NMI patients not undergoing cystectomy (n = 17), NMI-sMP compared with NMI-iMP differentiation was associated with an improved OS when compared with iMP (63 vs. 47 months, p = 0.05). CONCLUSIONS: MPUC is an aggressive variant of urothelial carcinoma (UC). Similar to conventional UC, LVI associated with MPUC is an adverse prognostic indicator. iMP is a morphological marker for LVI. Histopathological reports should distinguish between sMP and iMP differentiation.


Asunto(s)
Carcinoma de Células Transicionales/cirugía , Cistectomía/métodos , Neoplasias de la Vejiga Urinaria/cirugía , Adulto , Anciano , Anciano de 80 o más Años , Carcinoma de Células Transicionales/mortalidad , Carcinoma de Células Transicionales/patología , Diferenciación Celular , Supervivencia sin Enfermedad , Femenino , Humanos , Masculino , Persona de Mediana Edad , Invasividad Neoplásica , Estadificación de Neoplasias , Pronóstico , Modelos de Riesgos Proporcionales , Estudios Retrospectivos , Oncología Quirúrgica/métodos , Factores de Tiempo , Resultado del Tratamiento , Neoplasias de la Vejiga Urinaria/mortalidad , Neoplasias de la Vejiga Urinaria/patología , Urotelio/patología
2.
Int J Cancer ; 134(5): 1102-11, 2014 Mar 01.
Artículo en Inglés | MEDLINE | ID: mdl-23959905

RESUMEN

Bladder cancer patients suffer significant treatment failure, including high rates of recurrence and poor outcomes for advanced disease. If mechanisms to improve tumour cell treatment sensitivity could be identified and/or if tumour response could be predicted, it should be possible to improve local-control and survival. Previously, we have shown that radiation-induced DNA damage, measured by alkaline Comet assay (ACA), correlates bladder cancer cell radiosensitivity in vitro. In this study we first show that modified-ACA measures of cisplatin and mitomycin-C-induced damage also correlate bladder cancer cell chemosensitivity in vitro, with essentially the same rank order for chemosensitivity as for radiosensitivity. Furthermore, ACA studies of radiation-induced damage in different cell-DNA substrates (nuclei, nucleoids and intact parent cells) suggest that it is a feature retained in the prepared nucleoids that is responsible for the relative damage sensitivity of bladder cancer cells, suggestive of differences in the organisation of DNA within resistant vs. sensitive cells. Second, we show that ACA analysis of biopsies from bladder tumours reveal that reduced DNA damage sensitivity associates with poorer treatment outcomes, notably that tumours with a reduced damage response show a significant association with local recurrence of non-invasive disease and that reduced damage response was a better predictor of recurrence than the presence of high-risk histology in this cohort. In conclusion, this study demonstrates that mechanisms governing treatment-induced DNA damage are both central to and predictive of bladder cancer cell treatment sensitivity and exemplifies a link between DNA damage resistance and both treatment response and tumour aggression.


Asunto(s)
Ensayo Cometa/métodos , Daño del ADN , Neoplasias de la Vejiga Urinaria/tratamiento farmacológico , Línea Celular Tumoral , Cisplatino/farmacología , Humanos , Mitomicina/farmacología , Resultado del Tratamiento , Neoplasias de la Vejiga Urinaria/genética
3.
Int J Clin Pract ; 67(5): 435-48, 2013 May.
Artículo en Inglés | MEDLINE | ID: mdl-23137019

RESUMEN

More than 350,000 new cases of bladder cancer are diagnosed worldwide each year; the vast majority (> 90%) of these are transitional cell carcinomas (TCC). The most important risk factors for the development of bladder cancer are smoking and occupational exposure to toxic chemicals. Painless visible haematuria is the most common presenting symptom of bladder cancer; significant haematuria requires referral to a specialist urology service. Cystoscopy and urine cytology are currently the recommended tools for diagnosis of bladder cancer. Excluding muscle invasion is an important diagnostic step, as outcomes for patients with muscle invasive TCC are less favourable. For non-muscle invasive bladder cancer, transurethral resection followed by intravesical chemotherapy (typically Mitomycin C or epirubicin) or immunotherapy [bacillus Calmette-Guérin (BCG)] is the current standard of care. For patients failing BCG therapy, cystectomy is recommended; for patients unsuitable for surgery, the choice of treatment options is currently limited. However, novel interventions, such as chemohyperthermia and electromotive drug administration, enhance the effects of conventional chemotherapeutic agents and are being evaluated in Phase III trials. Radical cystectomy (with pelvic lymphadenectomy and urinary diversion) or radical radiotherapy are the current established treatments for muscle invasive TCC. Neoadjuvant chemotherapy is recommended before definitive treatment of muscle invasive TCC; cisplatin-containing combination chemotherapy is the recommended regimen. Palliative chemotherapy is the first-choice treatment in metastatic TCC.


Asunto(s)
Neoplasias de la Vejiga Urinaria/terapia , Administración Intravesical , Algoritmos , Vacuna BCG/uso terapéutico , Biomarcadores de Tumor/sangre , Tecnología Biomédica/tendencias , Vacunas contra el Cáncer/uso terapéutico , Quimioterapia Adyuvante , Cistectomía/métodos , Cistoscopía/métodos , Diagnóstico por Imagen/tendencias , Promoción de la Salud/organización & administración , Hematuria/etiología , Humanos , Escisión del Ganglio Linfático/instrumentación , Invasividad Neoplásica , Nefrectomía/métodos , Tratamientos Conservadores del Órgano/métodos , Cuidados Paliativos , Atención Primaria de Salud , Calidad de Vida , Radioterapia/instrumentación , Radioterapia/tendencias , Derivación y Consulta , Medición de Riesgo , Factores de Riesgo , Insuficiencia del Tratamiento , Uréter/cirugía , Neoplasias de la Vejiga Urinaria/etiología , Neoplasias de la Vejiga Urinaria/patología
4.
World J Urol ; 29(3): 291-301, 2011 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-21350870

RESUMEN

BACKGROUND: Making healthcare treatment decisions is a complex process involving a broad stakeholder base including patients, their families, health professionals, clinical practice guideline developers and funders of healthcare. METHODS: This paper presents a review of a methodology for the development of urological cancer care pathways (UCAN care pathways), which reflects an appreciation of this broad stakeholder base. The methods section includes an overview of the steps in the development of the UCAN care pathways and engagement with clinical content experts and patient groups. RESULTS: The development process is outlined, the uses of the urological cancer care pathways discussed and the implications for clinical practice highlighted. The full set of UCAN care pathways is published in this paper. These include care pathways on localised prostate cancer, locally advanced prostate cancer, metastatic prostate cancer, hormone-resistant prostate cancer, localised renal cell cancer, advanced renal cell cancer, testicular cancer, penile cancer, muscle invasive and metastatic bladder cancer and non-muscle invasive bladder cancer. CONCLUSION: The process provides a useful framework for improving urological cancer care through evidence synthesis, research prioritisation, stakeholder involvement and international collaboration. Although the focus of this work is urological cancers, the methodology can be applied to all aspects of urology and is transferable to other clinical specialties.


Asunto(s)
Medicina Basada en la Evidencia/tendencias , Guías de Práctica Clínica como Asunto , Literatura de Revisión como Asunto , Neoplasias Urológicas/terapia , Toma de Decisiones , Humanos , Terminología como Asunto
5.
Int J Technol Assess Health Care ; 27(1): 3-10, 2011 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-21262078

RESUMEN

OBJECTIVES: The aim of this study was to assess the test performance and clinical effectiveness of photodynamic diagnosis (PDD) compared with white light cystoscopy (WLC) in people suspected of new or recurrent bladder cancer. METHODS: A systematic review was conducted of randomized controlled trials (RCTs), nonrandomized comparative studies, or diagnostic cross-sectional studies comparing PDD with WLC. Fifteen electronic databases and Web sites were searched (last searches April 2008). For clinical effectiveness, only RCTs were considered. RESULTS: Twenty-seven studies (2,949 participants) assessed test performance. PDD had higher sensitivity than WLC (92 percent, 95 percent confidence interval [CI], 80-100 percent versus 71 percent, 95 percent CI, 49-93 percent) but lower specificity (57 percent, 95 percent CI, 36-79 percent versus 72 percent, 95 percent CI, 47-96 percent). For detecting higher risk tumors, median range sensitivity of PDD (89 percent [6-100 percent]) was higher than WLC (56 percent [0-100 percent]) whereas for lower risk tumors it was broadly similar (92 percent [20-95 percent] versus 95 percent [8-100 percent]). Four RCTs (709 participants) using 5-aminolaevulinic acid (5-ALA) as the photosensitising agent reported clinical effectiveness. Using PDD at transurethral resection of bladder tumor (TURBT) resulted in fewer residual tumors at check cystoscopy (relative risk [RR], 0.37, 95 percent CI, 0.20-0.69) and longer recurrence-free survival (RR, 1.37, 95 percent CI, 1.18-1.59), compared with WLC. CONCLUSIONS: PDD detects more bladder tumors than WLC, including more high-risk tumors. Based on four RCTs reporting clinical effectiveness, 5-aminolaevulinic acid-mediated PDD at TURBT facilitates a more complete resection and prolongs recurrence-free survival.


Asunto(s)
Cistoscopía , Fármacos Fotosensibilizantes , Neoplasias de la Vejiga Urinaria/diagnóstico , Técnicas de Diagnóstico Urológico/normas , Humanos , Ensayos Clínicos Controlados Aleatorios como Asunto , Sensibilidad y Especificidad , Neoplasias de la Vejiga Urinaria/patología
6.
Pilot Feasibility Stud ; 7(1): 164, 2021 Aug 23.
Artículo en Inglés | MEDLINE | ID: mdl-34425912

RESUMEN

BACKGROUND: Aviation has used a real-time observation method to advance anonymised feedback to the front-line and improve safe practice. Using an experiential learning method, this pilot study aimed to develop an observation-based real-time learning tool for final-year medical students with potential wider use in clinical practice. METHODS: Using participatory action research, we collected data on medical students' observations of real-time clinical practice. The observation data was analysed thematically and shared with a steering group of experts to agree a framework for recording observations. A sample of students (observers) and front-line clinical staff (observed) completed one-to-one interviews on their experiences. The interviews were analysed using thematic analysis. RESULTS: Thirty-seven medical students identified 917 issues in wards, theatres and clinics in an acute hospital trust. These issues were grouped into the themes of human influences, work environment and systems. Aviation approaches were adapted to develop an app capable of recording real-time positive and negative clinical incidents. Five students and eleven clinical staff were interviewed and shared their views on the value of a process that helped them learn and has the potential to advance the quality of practice. Concerns were shared about how the observational process is managed. CONCLUSION: The study developed an app (Healthcare Team Observations for Patient Safety-HTOPS), for recording good and poor clinical individual and team behaviour in acute-care practice. The process advanced medical student learning about patient safety. The tool can identify the totality of patient safety practice and illuminate strength and weakness. HTOPS offers the opportunity for collective ownership of safety concerns without blame and has been positively received by all stakeholders. The next steps will further refine the app for use in all clinical areas for capturing light noise.

7.
Eur Urol Open Sci ; 25: 39-43, 2021 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-33458711

RESUMEN

COVID-19 has resulted in the deferral of major surgery for genitourinary (GU) cancers with the exception of cancers with a high risk of progression. We report outcomes for major GU cancer operations, namely radical prostatectomy (RP), radical cystectomy (RC), radical nephrectomy (RN), partial nephrectomy (PN), and nephroureterectomy performed at 13 major GU cancer centres across the UK between March 1 and May 5, 2020. A total of 598 such operations were performed. Four patients (0.7%) developed COVID-19 postoperatively. There was no COVID-19-related mortality at 30 d. A minimally invasive approach was used in 499 cases (83.4%). A total of 228 cases (38.1%) were described as training procedures. Training case status was not associated with a higher American Society of Anesthesiologists (ASA) score (p = 0.194) or hospital length of stay (LOS; p > 0.05 for all operation types). The risk of contracting COVID-19 was not associated with longer hospital LOS (p = 0.146), training case status (p = 0.588), higher ASA score (p = 0.295), or type of hospital site (p = 0.303). Our results suggest that major surgery for urological cancers remains safe and training should be encouraged during the ongoing COVID-19 pandemic provided appropriate countermeasures are taken. These real-life data are important for policy-makers and clinicians when counselling patients during the current pandemic. PATIENT SUMMARY: We collected outcome data for major operations for prostate, bladder, and kidney cancers during the COVID-19 pandemic. These surgeries remain safe and training should be encouraged during the ongoing pandemic provided appropriate countermeasures are taken. Our real-life results are important for policy-makers and clinicians when counselling patients during the COVID-19 pandemic.

8.
Urol Int ; 85(3): 249-56, 2010.
Artículo en Inglés | MEDLINE | ID: mdl-20332611

RESUMEN

INTRODUCTION: The standard treatment for upper urinary tract transitional cell carcinoma (UUT-TCC) is open radical nephroureterectomy with excision of a bladder cuff. We assess the successful endoscopic completion and oncological efficacy of the various minimally invasive transurethral techniques devised for the management of the intramural ureter during nephroureterectomy. MATERIALS AND METHODS: A comprehensive review of the English literature until February 2009 using the PubMed database returned 42 relevant papers. Five methods of endoscopic management of the distal ureter were identified and compared to the open technique. RESULTS: There are no randomised studies. Successful completion of the endoscopic procedure was less (91%) for the ureteric stripping technique than for the other endoscopic modalities (99.8-100%). Recurrences were highest for laparoscopic extravesical ureteric stapling in conjunction with cystoscopic detachment of the ureter, although the numbers analysed were small. For the other endoscopic modalities, bladder recurrence, positive margins and retroperitoneal recurrence (20-37, 0-4 and 1-3%, respectively) in case series were similar compared with the open method (36, 5 and 3%, respectively). CONCLUSIONS: Current non-randomised evidence is open to selection bias and is insufficient to support or refute endoscopic management of the distal ureter as an alternative to open bladder cuff excision. We highlight the reported inefficiency of the ureteric stripping technique.


Asunto(s)
Carcinoma de Células Transicionales/cirugía , Nefrectomía/métodos , Uréter/cirugía , Neoplasias Ureterales/cirugía , Procedimientos Quirúrgicos Urológicos/métodos , Endoscopía/métodos , Humanos , Laparoscopía/métodos , Oncología Médica/métodos , Nefrología/métodos , Recurrencia , Resultado del Tratamiento , Vejiga Urinaria/cirugía
9.
Female Pelvic Med Reconstr Surg ; 26(2): 86-91, 2020 02.
Artículo en Inglés | MEDLINE | ID: mdl-31990793

RESUMEN

BACKGROUND: The rapid uptake of robotic surgery has largely been driven by the improved technical aspects of minimally invasive surgery including improved ergonomics, wristed instruments, and 3-dimensional vision. However, little attention has been given to the effect of physical separation of the surgeon from the rest of the operating team. PURPOSE: The aim of this study was to examine in depth how this separation affected team dynamics and staff emotions. METHODS: Robotic procedures were observed in 2 tertiary hospitals, and laparoscopic/open procedures were added for comparison; field notes were taken instantaneously. One-to-one interviews with theater team members were audio recorded and transcribed verbatim. Qualitative analysis was conducted via grounded theory approach using NVIVO11. RESULTS: Twenty-nine participants (26 interviewed) were recruited to the study (11 females) and 134 (109 robotic) hours of observation were completed across gynecology, urology, and colorectal surgery.The following 3 main themes emerged with compounding factors identified: (a) communication challenge, (b) immersion versus distraction, and (c) emotional impact. Compounding factors included the following: individual and team experience, staffing levels, and the physical theater environment. CONCLUSIONS: Our emergent theory is that "surgeon-team separation in robotic theaters poses communication challenges which impacts on situational awareness and staff emotions." These can be ameliorated by staff training, increased experience, and team/procedure consistency.


Asunto(s)
Barreras de Comunicación , Comunicación Interdisciplinaria , Grupo de Atención al Paciente/organización & administración , Procedimientos Quirúrgicos Robotizados , Procedimientos Quirúrgicos Operativos , Adulto , Actitud del Personal de Salud , Cirugía Colorrectal/métodos , Cirugía Colorrectal/tendencias , Femenino , Humanos , Masculino , Quirófanos/organización & administración , Investigación Cualitativa , Mejoramiento de la Calidad , Procedimientos Quirúrgicos Robotizados/métodos , Procedimientos Quirúrgicos Robotizados/psicología , Procedimientos Quirúrgicos Robotizados/normas , Robótica/métodos , Procedimientos Quirúrgicos Operativos/métodos , Procedimientos Quirúrgicos Operativos/psicología , Procedimientos Quirúrgicos Operativos/normas , Procedimientos Quirúrgicos Urogenitales/métodos , Procedimientos Quirúrgicos Urogenitales/tendencias
10.
Int J Oncol ; 34(4): 1155-63, 2009 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-19287975

RESUMEN

Survival rate of patients diagnosed with the invasive form of bladder cancer is low suggesting an urgent need to implement novel treatments. GTC (gemcitabine, paclitaxel and cisplatin) is a new chemotherapeutic regimen, which has shown promise in clinical trials. Given that receptor tyrosine kinases of the ErbB family are overexpressed in a high proportion of metastatic bladder tumours, approaches involving small-molecule inhibitors of ErbB receptors in combination with conventional cytostatic drugs are of potential interest. Here, we show that the dual inhibitor of ErbB receptors, lapatinib, enhances cytostatic and induces cytotoxic effects of GTC in two bladder cancer cell lines which differ with regard to expression levels of proteins taking part in the ErbB pathway. Lapatinib inhibited phosphorylation of ErbB receptors and also reduced the level of phosphorylated AKT. Flow cytometry analysis demonstrated that GTC treatment affects cell cycle distribution differently in the presence or absence of lapatinib. In RT112 cells, which express high levels of ErbB receptors and harbour wild-type p53, combined GTC/lapatinib treatment resulted in the phosphorylation of p53 at Ser46 and accumulation of sub-G1 cell populations. Our data indicate that a combinatorial approach involving GTC and lapatinib may have therapeutic potential in a subset of bladder tumours depending on the genetic context.


Asunto(s)
Protocolos de Quimioterapia Combinada Antineoplásica/uso terapéutico , Receptores ErbB/antagonistas & inhibidores , Quinazolinas/farmacología , Receptor ErbB-2/antagonistas & inhibidores , Neoplasias de la Vejiga Urinaria/tratamiento farmacológico , Línea Celular Tumoral , Separación Celular , Factor de Crecimiento Epidérmico/metabolismo , Citometría de Flujo , Humanos , Concentración 50 Inhibidora , Lapatinib , Fosforilación , Transducción de Señal , Resultado del Tratamiento
11.
Eur Urol ; 75(1): 63-71, 2019 01.
Artículo en Inglés | MEDLINE | ID: mdl-30274699

RESUMEN

BACKGROUND: There is no effective intravesical second-line therapy for non-muscle-invasive bladder cancer (NMIBC) when bacillus Calmette-Guérin (BCG) fails. OBJECTIVE: To compare disease-free survival time (DFS) between radiofrequency-induced thermo-chemotherapy effect (RITE) and institutional standard second-line therapy (control) in NMIBC patients with recurrence following induction/maintenance BCG. DESIGN, SETTINGS, AND PARTICIPANTS: Open-label, phase III randomised controlled trial accrued across 14 centres between May 2010 and July 2013 (HYMN [ClinicalTrials.gov: NCT01094964]). INTERVENTION: Patients were randomly assigned (1:1) to RITE (60min, 40mg mitomycin-C, 42±2°C) or control following stratification for carcinoma in situ (CIS) status (present/absent), therapy history (failure of previous induction/maintenance BCG), and treatment centre. OUTCOME MEASUREMENTS AND STATISTICAL ANALYSIS: Primary outcome measures were DFS and complete response (CR) at 3 mo for the CIS at randomisation subgroup. Analysis was based on intention-to-treat. RESULTS AND LIMITATIONS: A total of 104 patients were randomised (48 RITE: 56 control). Median follow-up for the 31 patients without a DFS event was 36 mo. There was no significant difference in DFS between treatment arms (hazard ratio [HR] 1.33, 95% confidence interval [CI] 0.84-2.10, p=0.23) or in 3-mo CR rate in CIS patients (n=71; RITE: 30% vs control: 47%, p=0.15). There was no significant difference in DFS between treatment arms in non-CIS patients (n=33; RITE: 53% vs control: 24% at 24 mo, HR 0.50, 95% CI 0.22-1.17, p=0.11). DFS was significantly lower in RITE than in control in CIS with/without papillary patients (n=71; HR 2.06, 95% CI 1.17-3.62, p=0.01; treatment-subgroup interaction p=0.007). Disease progression was observed in four patients in each treatment arm. Adverse events and health-related quality of life between treatment arms were comparable. CONCLUSIONS: DFS was similar between RITE and control. RITE may be a second-line therapy for non-CIS recurrence following BCG failure; however, confirmatory trials are needed. RITE patients with CIS with/without papillary had lower DFS than control. HYMN highlights the importance of the control arm when evaluating novel therapies. PATIENT SUMMARY: This study did not show a difference in bladder cancer outcomes between microwave-heated chemotherapy and standard of care treatment. Papillary bladder lesions may benefit from microwave-heated chemotherapy treatment; however, more research is needed. Both treatments are similarly well tolerated.


Asunto(s)
Antineoplásicos/uso terapéutico , Vacuna BCG/uso terapéutico , Mitomicina/uso terapéutico , Recurrencia Local de Neoplasia/terapia , Terapia por Radiofrecuencia , Neoplasias de la Vejiga Urinaria/terapia , Administración Intravesical , Anciano , Anciano de 80 o más Años , Carcinoma in Situ/patología , Carcinoma in Situ/terapia , Femenino , Humanos , Estimación de Kaplan-Meier , Masculino , Neoplasias de la Vejiga Urinaria/mortalidad , Neoplasias de la Vejiga Urinaria/patología
13.
Clin Oncol (R Coll Radiol) ; 18(9): 702-9, 2006 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-17100158

RESUMEN

AIMS: Epidermal growth factor receptor (EGFR) is expressed by over 70% of muscle-invasive bladder tumours and is associated with diminished overall survival. In model tumour systems, ionising radiation has been shown to activate EGFR, leading to cellular proliferation and is therefore a possible mechanism of underlying radioresistance. We carried out an immunohistochemical study relating the clinical outcome of patients receiving radical radiotherapy for muscle-invasive bladder cancer to tumour EGFR status. MATERIALS AND METHODS: Archived paraffin-embedded tumours from 110 consecutive patients receiving radical radiotherapy for muscle-invasive bladder cancer between 1991 and 1997 were immunohistochemically stained for EGFR. Data were collected concerning the tumour stage and grade, the presence of ureteric obstruction, the response to radiotherapy at 3 months, local recurrence rates, metastatic spread and survival. Multivariate analysis of potential independent prognostic factors of impaired bladder cancer-specific survival was carried out using Cox's regression. RESULTS: Of 110 tumours, 79 (72%) stained positively for EGFR. Of 87 patients undergoing the 3-month check cystoscopy, 60 (69%) had a positive response to radiotherapy. A positive response to radiotherapy correlated significantly with a negative EGFR status (chi(2) test, P = 0.05). Kaplan-Meier survival analysis revealed a trend towards improved bladder cancer-specific survival in EGFR-negative patients (Log-rank, P = 0.10). A lack of response to radiotherapy at 3 months, local recurrence, metastatic spread and the presence of ureteric obstruction were all independent prognostic factors for diminished bladder cancer-specific survival (Cox's regression: P = 0.009, P = 0.001, P = 0.04 and P = 0.005, respectively). CONCLUSIONS: EGFR status predicts the local response to radiotherapy but does not provide prognostic utility in relation to overall or bladder cancer-specific survival. As EGFR status seems to be linked to the initial response to radiotherapy, its inhibition may be a means of enhancing the radio-responsiveness of these poor prognosis tumours. Colquhoun, A. J.


Asunto(s)
Carcinoma de Células Transicionales/radioterapia , Receptores ErbB/análisis , Neoplasias de la Vejiga Urinaria/radioterapia , Anciano , Anciano de 80 o más Años , Biomarcadores de Tumor/análisis , Carcinoma de Células Transicionales/metabolismo , Supervivencia sin Enfermedad , Femenino , Humanos , Masculino , Persona de Mediana Edad , Análisis Multivariante , Neoplasias de los Músculos/mortalidad , Neoplasias de los Músculos/radioterapia , Neoplasias de los Músculos/secundario , Invasividad Neoplásica , Recurrencia Local de Neoplasia/diagnóstico , Estadificación de Neoplasias , Pronóstico , Análisis de Supervivencia , Neoplasias de la Vejiga Urinaria/metabolismo
14.
Eur J Cancer ; 41(1): 61-70, 2005 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-15617991

RESUMEN

Over the last decade, epidemiological, experimental and clinical studies have implicated oxidative stress in the development and progression of prostate cancer. Oxidative stress may be linked to the effects of androgens, anti-oxidant systems and the pre-malignant condition, high-grade prostatic intraepithelial neoplasia. Cyclooxygenase-2 activity has been linked with prostate carcinogenesis. Evidence suggests that oxidative stress and cyclo-oxygenase-2 activity may be mechanistically linked. Agents such as anti-oxidants and cyclo-oxgenase-2 inhibitors may be of value in the chemoprevention of prostate cancer. The feasibility of intervention with such agents will depend on the development and validation of biomarkers for clinical trials, particularly markers of oxidative damage caused by reactive oxygen species (ROS). A greater understanding of the molecular events associated with oxidative stress will enhance the development of such biomarkers and should result in better strategies for the chemoprevention of prostate cancer.


Asunto(s)
Quimioprevención/métodos , Estrés Oxidativo/fisiología , Prostaglandina-Endoperóxido Sintasas/metabolismo , Neoplasia Intraepitelial Prostática/prevención & control , Neoplasias de la Próstata/prevención & control , Anciano , Anciano de 80 o más Años , Andrógenos/fisiología , Biomarcadores de Tumor/metabolismo , Ciclooxigenasa 1 , Ciclooxigenasa 2 , Aductos de ADN/metabolismo , Humanos , Lipooxigenasa/metabolismo , Masculino , Proteínas de la Membrana , Persona de Mediana Edad , Neoplasia Intraepitelial Prostática/tratamiento farmacológico , Neoplasia Intraepitelial Prostática/enzimología , Neoplasias de la Próstata/tratamiento farmacológico , Neoplasias de la Próstata/enzimología
17.
Clin Cancer Res ; 5(11): 3500-7, 1999 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-10589764

RESUMEN

To examine retrospectively the prognostic significance of TP53 immunoreactivity for both tumor response and patient survival in 83 patients with nonmetastatic muscle-invasive bladder cancer treated with a single transurethral resection (TUR) of tumor and combined cisplatin-based systemic chemotherapy followed by repeat TUR, paraffin-embedded sections of a bladder tumor obtained at TUR before chemotherapy (1 T2, 52 T3, and 30 T4) were immunostained for TP53 using monoclonal PAb1801 and DO-7 antibodies. For the entire cohort, TP53 immunopositivity (PAb1801 or DO-7) did not predict complete response (CR), complete or partial response (PR), progressive disease, or time to death from bladder cancer. There was a highly significant correlation between PAb1801 and DO-7 nuclear immunoreactivity (r = 0.8242; P<0.0001). In 76 patients in which complete clinical data were available, tumor stage (T2/T3; P = 0.0499), CR and PR (P = 0.0016) and CR (P<0.0001) were associated with patient survival. In a multivariate model, CR (P<0.0001) was the only independent predictor of improved survival. In complete responders, neither TP53 immunostaining nor clinicopathological factors stratified patients into prognostic groups. However, in the subset of patients (n = 38) who were chemoresistant (PR or progressive disease), improved survival was associated with > or =20% TP53 immunoreactivity (PAb1801; P = 0.0191) and tumor stage (T2/T3; P = 0.0358). TP53 immunopositivity (PAb1801 or DO-7) did not predict overall survival or response to systemic chemotherapy in patients with nonmetastatic but predominantly clinical stage > or =T3 bladder cancer, but it had prognostic significance within the chemoresistant subgroup.


Asunto(s)
Protocolos de Quimioterapia Combinada Antineoplásica/uso terapéutico , Cisplatino/uso terapéutico , Resistencia a Múltiples Medicamentos , Proteína p53 Supresora de Tumor/análisis , Neoplasias de la Vejiga Urinaria/tratamiento farmacológico , Neoplasias de la Vejiga Urinaria/patología , Anciano , Anciano de 80 o más Años , Cisplatino/administración & dosificación , Terapia Combinada , Supervivencia sin Enfermedad , Epirrubicina/administración & dosificación , Femenino , Genes p53 , Humanos , Masculino , Metotrexato/administración & dosificación , Persona de Mediana Edad , Invasividad Neoplásica , Estadificación de Neoplasias , Valor Predictivo de las Pruebas , Pronóstico , Estudios Retrospectivos , Tasa de Supervivencia , Neoplasias de la Vejiga Urinaria/mortalidad , Neoplasias de la Vejiga Urinaria/cirugía , Vinblastina/administración & dosificación
18.
Int J Radiat Oncol Biol Phys ; 51(5): 1234-40, 2001 Dec 01.
Artículo en Inglés | MEDLINE | ID: mdl-11728682

RESUMEN

PURPOSE: The prognostic value of p21 and p53 expression was evaluated for patients with muscle-invasive bladder cancer treated by radical radiotherapy. METHODS AND MATERIALS: Sixty-eight paraffin-embedded sections from surgically resected tumors taken prior to irradiation were immunostained for p21 and p53. RESULTS: Nuclear staining for p21 and p53 was demonstrated in 32/68 (47%) and 46/68 (68%) tumors, respectively. There was no correlation between p21 and p53 immunopositivity in this group (r = 0.067, p = 0.56). Patients were stratified into four distinct groups depending on staining for p21 and p53: p21+p53+, p21+p53-, p21-p53+, and p21-p53-. Patients with p21+p53+ tumors had the best prognosis with a 3-year survival of 82% compared to 12% for p21-p53+ tumors (p = 0.0031), 29% for p21+p53- tumors (p = 0.0108); and 45% for p21-p53- tumors (p = 0.0375). The p21+p53+ group also demonstrated significantly improved survival when a combined analysis was performed of p21-p53+, p21-p53-, and p21+p53- tumors (3-year survival = 30%, p = 0.0062). In a multivariate model, p21+p53+ tumors (p = 0.0108, relative risk [RR] = 5.18) and complete/partial response (p = 0.0019, RR = 3.76) were the only independent predictors of improved survival. CONCLUSIONS: With muscle-invasive bladder tumors treated by radical radiotherapy, stratification for p21 and p53 identifies distinct prognostic groups, with p21+p53+ tumors being associated with the best survival and p21-p53+ the worst.


Asunto(s)
Ciclinas/análisis , Proteína p53 Supresora de Tumor/análisis , Neoplasias de la Vejiga Urinaria/radioterapia , Anciano , Anciano de 80 o más Años , Inhibidor p21 de las Quinasas Dependientes de la Ciclina , Femenino , Humanos , Inmunohistoquímica , Masculino , Persona de Mediana Edad , Análisis de Regresión , Neoplasias de la Vejiga Urinaria/química , Neoplasias de la Vejiga Urinaria/mortalidad
19.
Eur J Pediatr Surg ; 14(5): 328-32, 2004 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-15543482

RESUMEN

AIM: To prospectively review the management and treatment of hypospadias in a single regional centre, and in particular, to assess the spectrum of cases treated, techniques used and to determine the nature of the complications. METHODS: One hundred and fifty-three consecutive boys undergoing hypospadias repair during a 36-month period were included in the study. Information was collected prospectively and included the site of the urethral meatus, presence of chordee, surgical technique employed, use of urinary diversion, and the prescription of postoperative antibiotics and analgesics. Patients were assessed in the clinic following surgery at which time information on outcome and complications was obtained. RESULTS: One hundred and fifty-seven procedures for hypospadias were performed. Single-stage reconstruction was performed in 145 boys. GRAP (glanular reconstruction and preputioplasty) repair was the most common operation employed (n=112). The overall fistula rate was 11.7 % with the majority of patients having a satisfactory functional and cosmetic outcome following surgery. CONCLUSION: A variety of techniques can be employed to provide satisfactory correction of hypospadias with an increasing emphasis on single-stage day case procedures. GRAP repair is the favoured option for distal hypospadias and incorporates preservation of the prepuce.


Asunto(s)
Hipospadias/cirugía , Auditoría Médica , Adolescente , Niño , Preescolar , Humanos , Hipospadias/patología , Lactante , Masculino , Complicaciones Posoperatorias/epidemiología , Estudios Prospectivos , Resultado del Tratamiento , Reino Unido/epidemiología , Fístula Urinaria/epidemiología , Procedimientos Quirúrgicos Urológicos/métodos
20.
Eur Urol ; 64(5): 799-810, 2013 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-23643550

RESUMEN

CONTEXT: Controversy remains over whether adrenalectomy and lymph node dissection (LND) should be performed concomitantly with radical nephrectomy (RN) for locally advanced renal cell carcinoma (RCC) cT3-T4N0M0. OBJECTIVE: To systematically review all relevant literature comparing oncologic, perioperative, and quality-of-life (QoL) outcomes for locally advanced RCC managed with RN with or without concomitant adrenalectomy or LND. EVIDENCE ACQUISITION: Relevant databases were searched up to August 2012. Randomised controlled trials (RCTs) and comparative studies were included. Outcome measures were overall survival, QoL, and perioperative adverse effects. Risks of bias (RoB) were assessed using Cochrane RoB tools. Quality of evidence was assessed using the Grading of Recommendations Assessment, Development and Evaluation approach. EVIDENCE SYNTHESIS: A total of 3658 abstracts and 252 full-text articles were screened. Eight studies met the inclusion criteria: six LNDs (one RCT and five nonrandomised studies [NRSs]) and two adrenalectomies (two NRSs). RoB was high across the evidence base, and the quality of evidence from outcomes ranged from moderate to very low. Meta-analyses were not undertaken because of diverse study designs and data heterogeneity. There was no significant difference in survival between the groups, even though 5-yr overall survival appears better for the RN plus LND group compared with the no-LND group in one randomised study. There was no evidence of a difference in adverse events between the RN plus LND and no-LND groups. No studies reported QoL outcomes. There was no evidence of an oncologic difference between the RN with adrenalectomy and RN without adrenalectomy groups. No studies reported adverse events or QoL outcomes. CONCLUSIONS: There is insufficient evidence to draw any conclusions on oncologic outcomes for patients having concomitant LND or ipsilateral adrenalectomy compared with patients having RN alone for cT3-T4N0M0 RCC. The quality of evidence is generally low and the results potentially biased. Further research in adequately powered trials is needed to answer these questions.


Asunto(s)
Neoplasias de las Glándulas Suprarrenales/cirugía , Adrenalectomía , Carcinoma de Células Renales/cirugía , Neoplasias Renales/cirugía , Escisión del Ganglio Linfático , Nefrectomía , Neoplasias de las Glándulas Suprarrenales/mortalidad , Neoplasias de las Glándulas Suprarrenales/secundario , Adrenalectomía/efectos adversos , Adrenalectomía/mortalidad , Carcinoma de Células Renales/mortalidad , Carcinoma de Células Renales/patología , Humanos , Estimación de Kaplan-Meier , Neoplasias Renales/mortalidad , Neoplasias Renales/patología , Escisión del Ganglio Linfático/efectos adversos , Escisión del Ganglio Linfático/mortalidad , Metástasis Linfática , Invasividad Neoplásica , Estadificación de Neoplasias , Nefrectomía/efectos adversos , Nefrectomía/mortalidad , Calidad de Vida , Factores de Riesgo , Resultado del Tratamiento
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