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INTRODUCTION: Restaging transurethral resection (re-TUR) of high grade T1 bladder cancer (HGT1-BC) is recommended but the impact in terms of recurrence-free survival (RFS) and progression-free survival (PFS) is discussed. The objective of this study was to evaluate our practice of re-TUR for these tumors and its impact on overall survival (OS), RFS and PFS. MATERIALS AND METHODS: A retrospective observational study was conducted between 2010 and 2020. The inclusion criteria was the presence of newly diagnosed HGT1-BC. Patients with incomplete resection, suspicion of infiltrating tumor, upper tract urothelial cancer, or metastatic disease were ineligible. Two groups were defined : Group 1 with re-TUR and Group 2 without re-TUR. RFS and PFS were evaluated. RESULTS: A total of 78 patients were included, including 50 (64,1%) in group 1. There were no significant differences between the two groups. The mean time to re-TUR was 8 weeks and 60% residual tumor was found. Initial under-staging was found in 12% of cases. RFS and PFS were significantly better in Group 1 (P=0.0019; P=0,02). No significant were found between the groups in OS and specific survival (SS). CONCLUSION: Performing a re-TUR for high grade T1 bladder tumors allows detection of residual tumor and decreases the risk of under-evaluation. It is associated with a significant improvement in RFS and PFS with no impact on OS and SS.
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Neoplasias de la Vejiga Urinaria , Vejiga Urinaria , Humanos , Supervivencia sin Progresión , Neoplasia Residual/patología , Neoplasia Residual/cirugía , Estadificación de Neoplasias , Vejiga Urinaria/patología , Neoplasias de la Vejiga Urinaria/patología , Estudios Retrospectivos , Recurrencia Local de Neoplasia/cirugía , CistectomíaRESUMEN
OBJECTIVE: The main objective was to evaluate the complications of continuous urinary shunts in a French university hospital according to surgical technique and functional results especially on continence. The secondary objective was to evaluate the management of complications. METHODS: A retrospective study was conducted between January 2008 and August 2017. Patients who had a continent cystostomy with or without bladder augmentation were included. Diversions for non-neurological causes were excluded. Cystostomy was performed using the appendix or a Monti's artifice. Data collected included complications and their management, functionality of the diversion and of the bladder reservoir, cystostomy continence, and urethral continence. RESULTS: Nineteen patients were included. The median follow-up time was 46 months. The majority of early postoperative complications were classified as grade II Clavien-Dindo. No postoperative deaths occurred. Late complications most frequently involved cystostomy duct stenosis (n=5), cystostomy incontinence (n=5), and urethral incontinence (n=8). Thirteen patients had revision surgery for late complications. Late complications on continence evolved favorably after revision surgery or medical treatment in all, but one case. CONCLUSION: Our results are consistent with the literature. Complications and the re-interventions are frequent and should lead to a multidisciplinary information and evaluation of the patient in preoperative care. LEVEL OF PROOF: 3.
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Vejiga Urinaria Neurogénica , Derivación Urinaria , Incontinencia Urinaria , Cistostomía , Estudios de Seguimiento , Hospitales Universitarios , Humanos , Estudios RetrospectivosRESUMEN
OBJECTIVE: - The purpose of the guidelines national committee ccAFU was to propose updated french guidelines for prostate cancer. METHODS: - A Medline search was achieved between 2018 and 2020, as regards diagnosis, options of treatment and follow-up of prostate cancer (PCA), and to evaluate the different references specifying their levels of evidence. RESULTS: - The guidelines outline the genetics, epidemiology and diagnosis of prostate cancer, as well as the concepts of screening and early detection. MRI, the gold standard imaging test for localized cancer, is indicated before prostate biopsies are performed. The therapeutic methods are detailed and indicated according to the clinical situation. Active surveillance is a reference therapeutic option for low-risk tumours with a low evolutionary risk. Early salvage radiotherapy is indicated in case of biological recurrence after radical prostatectomy. Androgen deprivation therapy (ADT) remains the backbone therapy in the metastatic stage. Docetaxel in combination with ADT improves overall first-line survival in synchronous metastatic prostate cancer. In this situation, the combination of ADT with abiraterone is also a standard of care regardless of tumor volume. Recent data indicate that ADT should be indicated with a new generation of hormone therapy (Apalutamide or Enzalutamide) in metastatic synchronous or metachronous patients, regardless of tumour volume. Local treatment of prostate cancer with radiotherapy improves survival in synchronous oligometastatic patients. Targeted treatment of metastases is being evaluated. In patients with castration-resistant prostate cancer (CRPC), new therapies that have emerged in recent years help to better control tumor progression and improve survival. CONCLUSION: - These updated french guidelines will contribute to increase the level of urological care for the diagnosis and treatment for prostate cancer.
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Neoplasias de la Próstata/diagnóstico , Neoplasias de la Próstata/terapia , Protocolos Clínicos , Árboles de Decisión , Humanos , MasculinoRESUMEN
OBJECTIVE: The aim of the Cancerology Committee of the French Association of urology (CCAFU) is to propose an update of the guidelines in the management of hormone-sensitive metastatic prostate cancer. METHODS: A systematic review (Medline) of the literature from 2018 to 2020 was conducted by the CCAFU Findings. Several patterns can be defined at this stage depending on prognostic, metastatic volume, and whether metastases are synchronous or metachronous. Androgenic deprivation therapy (ADT) remains the mainstay of treatment at the metastatic stage. Docetaxel in combination with ADT improves overall survival in synchronous metastatic prostate cancer. In this situation, the combination of ADT with abiraterone is also a standard of care regardless of tumor volume. Recent data have led to the recommendation that ADT should be used in conjunction with a new generation hormone therapy (Apalutamide or Enzalutamide) in metastatic synchronous or metachronous patients, regardless of tumour volume. Local treatment of prostate cancer with radiotherapy improves survival in synchronous oligometastatic patients. Metastases-directed therapy is being evaluated. CONCLUSION: This update of the French recommendations should help improve the management of patients with prostate cancer.
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Antagonistas de Andrógenos/uso terapéutico , Neoplasias de la Próstata/tratamiento farmacológico , Neoplasias de la Próstata/patología , Humanos , Masculino , Metástasis de la NeoplasiaRESUMEN
PURPOSE: The goal of our study was to describe general practitioner's (GP) practice regarding prostate cancer screening, the prescribing of prostate MRI and to investigate the factors associated with the prescribing of prostate MRI (pMRI). METHODS: A survey was addressed to 1127 GP of the "Bourgogne-Franche Comté" region before the new CCAFU's guidelines publication. RESULTS: 93 practitioners responded, giving a response rate of 8.3%. Eighty GP (86%) responded performing prostate cancer screening. The main means used were the assaying of PSA alone (23 practitioners, 28.8%) or the combination of PSA dosage and digital rectal examination (36 practitioners: 45%). It should be noted that 31 practitioners (39%) did not perform digital rectal examination as part of prostate cancer screening. Thirty two physicians prescribed pMRIs (34.5%.) before any urological consultation. The main indications were several abnormal PSA assays (27 GP, 84.4%) and/or suspicious rectal examination (15 GP, 46.9%). The main reason of this prescription was the gain of time for patient or urologist. Screening was carried out independently of the demographic characteristics of the physicians interviewed. Similarly, the prescription of prostate MRI was not related to the achievement of prostate cancer screening or the screening methods used. CONCLUSION: It seems that the prescription of pMRI has already become part of the prescribing habits of a number of general practitioners. LEVEL OF EVIDENCE: 4.
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Detección Precoz del Cáncer , Medicina General , Imagen por Resonancia Magnética , Pautas de la Práctica en Medicina , Neoplasias de la Próstata/diagnóstico , Detección Precoz del Cáncer/métodos , Femenino , Francia , Encuestas de Atención de la Salud , Humanos , MasculinoRESUMEN
PURPOSE: To assess the performance of a computer-aided diagnosis (CADx) system trained at characterizing International Society of Urological Pathology (ISUP) grade≥2 peripheral zone (PZ) prostate cancers on multiparametric magnetic resonance imaging (mpMRI) examinations from a different institution and acquired on different scanners than those used for the training database. PATIENTS AND METHODS: Preoperative mpMRIs of 74 men (median age, 65.7 years) treated by prostatectomy between 2014 and 2017 were retrospectively selected. One radiologist outlined suspicious lesions and scored them using Prostate Imaging-Reporting and Data System version 2 (PI-RADSv2); their CADx score was calculated using a classifier trained on an independent database of 106 patients treated by prostatectomy in another institution. The lesions' nature was assessed by comparison with prostatectomy whole-mounts. Diagnostic accuracy was estimated with areas under receiver operating characteristic curves (AUCs). Sensitivity and specificity were calculated using a CADx threshold (≥0.21) that yielded 95% sensitivity in the training database, and a PI-RADSv2≥3 threshold. RESULTS: A total of 127 lesions (PZ, n=104; transition zone [TZ], n=23) were described. In PZ, CADx and PI-RADSv2 scores had similar AUCs for characterizing ISUP grade≥2 cancers (0.78 [95% confidence interval (CI): 0.69-0.87] vs. 0.74 [95%CI: 0.62-0.82], respectively) (P=0.59). Sensitivity and specificity were respectively 89% (95%CI: 82-97%) and 42% (95%CI: 26-58%) for the CADx score, and 97% (95%CI: 93-100%) and 37% (95%CI: 22-52%) for the PI-RADSv2 score. In TZ, both scores showed poor specificity. CONCLUSION: In this external cohort, the CADx and PI-RADSv2 scores showed similar performances in characterizing ISUP grade≥2 cancers.
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Diagnóstico por Computador , Imágenes de Resonancia Magnética Multiparamétrica , Neoplasias de la Próstata/diagnóstico , Anciano , Humanos , Interpretación de Imagen Asistida por Computador , Masculino , Imágenes de Resonancia Magnética Multiparamétrica/instrumentación , Prostatectomía , Neoplasias de la Próstata/patología , Neoplasias de la Próstata/cirugía , Estudios Retrospectivos , Sensibilidad y EspecificidadRESUMEN
OBJECTIVE: Presentation of data collected on urology claims from the register of a French insurance company. MATERIAL AND METHOD: Compensation claims involving urologists covering the period 2009-2018 were identified and analyzed. RESULTS: A total of 37 files were found. Oncological and functional surgical interventions accounts for 78% of repair claims. Postoperative complications represent 76% of the cases. The most represented acts are total prostatectomy (5) and promonto-fixation (4). The average time of complaint is 28.6 months [1-144 months], the average duration of a procedure (opening-closing) is 32.8 months [12-72 months]. The Conciliation and Compensation Commissions (CCC) and the High Court Courts (HCC) were solicited respectively in 51% and 33% of the proceedings. An amicable agreement is found in 16% of cases. There was no criminal or disciplinary proceedings. The average cost of a closed urology file is 7836 [0-31,120 ]. In total, 64.8% of the expertises confirm practices in the respect of the rules of the art. CONCLUSION: This series presents the first forensic analysis of a portfolio of urologists on a period of 9 years in French urology. There is a rate of responsibility retained against the practitioner in only 27% of cases. The low rate of faulty files, the absence of a conviction for breach of the duty to provide information and in connection with antibiotic prophylaxis seem to confirm that the practice of urology in France is of good quality, a further study on a longer period of time and on a larger cohort of urologists would allow a finer medico-legal approach. LEVEL OF EVIDENCE: 3.
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Responsabilidad Legal , Errores Médicos , Urología/legislación & jurisprudencia , Adulto , Niño , Compensación y Reparación/legislación & jurisprudencia , Femenino , Francia/epidemiología , Humanos , Enfermedad Iatrogénica/economía , Enfermedad Iatrogénica/epidemiología , Recién Nacido , Aseguradoras , Revisión de Utilización de Seguros/economía , Revisión de Utilización de Seguros/estadística & datos numéricos , Responsabilidad Legal/economía , Masculino , Mala Praxis/legislación & jurisprudencia , Mala Praxis/estadística & datos numéricos , Errores Médicos/economía , Errores Médicos/estadística & datos numéricos , Complicaciones Posoperatorias/economía , Complicaciones Posoperatorias/epidemiología , Complicaciones Posoperatorias/prevención & control , Estudios Retrospectivos , Factores de Riesgo , Procedimientos Quirúrgicos Urológicos Masculinos/efectos adversos , Procedimientos Quirúrgicos Urológicos Masculinos/economía , Procedimientos Quirúrgicos Urológicos Masculinos/estadística & datos numéricos , Urología/economíaRESUMEN
This article has been retracted: please see Elsevier Policy on Article Withdrawal (http://www.elsevier.com/locate/withdrawalpolicy). Cet article est retiré de la publication à la demande des auteurs car ils ont apporté des modifications significatives sur des points scientifiques après la publication de la première version des recommandations. Le nouvel article est disponible à cette adresse: DOI:10.1016/j.purol.2019.01.007. C'est cette nouvelle version qui doit être utilisée pour citer l'article. This article has been retracted at the request of the authors, as it is not based on the definitive version of the text because some scientific data has been corrected since the first issue was published. The replacement has been published at the DOI:10.1016/j.purol.2019.01.007. That newer version of the text should be used when citing the article.
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Oncología Médica/normas , Neoplasias de la Próstata/terapia , Francia , Humanos , Masculino , Oncología Médica/organización & administración , Oncología Médica/tendencias , Pautas de la Práctica en Medicina/normas , Pautas de la Práctica en Medicina/tendencias , Sociedades Médicas/organización & administración , Sociedades Médicas/normasAsunto(s)
Oncología Médica/normas , Neoplasias de la Próstata/terapia , Acetato de Abiraterona/uso terapéutico , Ensayos Clínicos Fase III como Asunto , Práctica Clínica Basada en la Evidencia , Francia , Humanos , Masculino , Oncología Médica/organización & administración , Oncología Médica/tendencias , Metástasis de la Neoplasia , Pautas de la Práctica en Medicina/normas , Pautas de la Práctica en Medicina/tendencias , Neoplasias de la Próstata/mortalidad , Neoplasias de la Próstata/patología , Ensayos Clínicos Controlados Aleatorios como Asunto , Sociedades Médicas/normas , Análisis de Supervivencia , Terapias en Investigación/métodos , Terapias en Investigación/normas , Terapias en Investigación/tendenciasRESUMEN
INTRODUCTION: Since 2014, OnabotulinumtoxinA Botox® (Allergan, Inc., Irvine, USA) represents a new therapeutic option for second-line treatment of idiopathic overactive bladder. The purpose of the current study was to evaluate practices of surgeons using onabotulinium toxin (BoNTA) in this indication. MATERIAL AND METHODS: All urogynecology centers of the country were asked in order to list all patients who were treated since marketing autorisation. Patient symptoms, previous treatments, paraclinic evaluations, data of surgery and the characteristics of the follow up were collected and analyzed. RESULTS: Six centers used BoNTA and five have accepted to participate. Ninety-seven patients have been identified. Sixty-eight first injections (70 %) were carried out with the strict frameworf of the marketing autorisation (urinary frequency, urinary urgency, urinary incontinence). All patients had at least two symptoms. In 69 %, Botulinum toxin was a second-line treatment after the failure of tibial neuromodulation or sacral neuromodulation. Urodynamic evaluation was carried out for 91 % of patients. The search for a post-void residual volume was observed for 59 % of patients during the follow up. CONCLUSION: In our country, BoNTA injections for idiopathic overactive bladder are mainly effected after tibial neuromodulation or sacral neuromodulation failure. Diagnostic, operating and outcome evaluation practices are still very heterogeneous pleading for a greater standardization of this new therapy in this indication. LEVEL OF EVIDENCE: 3.
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Toxinas Botulínicas Tipo A/uso terapéutico , Fármacos Neuromusculares/uso terapéutico , Vejiga Urinaria Hiperactiva/tratamiento farmacológico , Anciano , Femenino , Francia , Humanos , Masculino , Estudios RetrospectivosRESUMEN
INTRODUCTION: The American Association for the Surgery of Trauma (AAST) Organ Injury Scale (OIS) is the most used classification for renal trauma. It determines the radiologic monitoring, only recommended for high-grade injuries. The aim of this study was to assess the subjectivity of AAST scaling and its impact on short-term follow-up. METHODS: We retrospectively reviewed all patients with blunt renal injuries admitted at a university hospital between 2010 and 2015. Computed Tomography (CT) scan were analyzed and injuries graded according to AAST OIS independently by a senior radiologist, a senior urologist who was blind to clinical data and a resident urologist. Grading disagreements were analyzed collegially to obtain a final rating. The agreement of AAST scaling was evaluated through the Cohen's Kappa coefficient. RESULTS: Ninety-seven patients had 101 renal injuries: low grade in 58.4% (11.9% grade I, 17.8% grade II, 28.7% grade III) and high grade in 41.6% of cases (23.6% grade IV and 17.8% grade V). The agreement was fair with Kappa coefficient at 0.36. The agreement was moderate in severity sub-division analysis (low or high grade): Kappa coefficient at 0.59. There was a disagreement in 49.5% between the senior urologist's and the senior radiologist's ratings. Those differences brought to a severity group change and radiologic follow-up modification in 34% (n=17). CONCLUSION: AAST OIS for renal trauma suffers from subjectivity but is improved by severity sub-group analysis. This subjectivity influences the radiologic follow-up but could be reduced by collegiate rating. LEVEL OF EVIDENCE: 4.
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Riñón/lesiones , Riñón/cirugía , Tomografía Computarizada por Rayos X , Adolescente , Adulto , Anciano , Anciano de 80 o más Años , Niño , Preescolar , Femenino , Estudios de Seguimiento , Humanos , Puntaje de Gravedad del Traumatismo , Riñón/diagnóstico por imagen , Masculino , Persona de Mediana Edad , Reproducibilidad de los Resultados , Estudios Retrospectivos , Adulto JovenRESUMEN
OBJECTIVE: The purpose of the guidelines national committee ccAFU was to propose updated French guidelines for prostate cancer. METHODS: A Medline search was achieved between 2016 and 2018, as regards diagnosis, options of treatment and follow-up of prostate cancer, and to evaluate the different references specifying their levels of evidence. RESULTS: Epidemiology, classification, staging systems, diagnostic evaluation of prostate cancer are reported. Disease management options are detailed. Recommandations are reported according to the different clinical situations. Active surveillance is a major option in low risk PCa. Radical prostatectomy remains a standard of care of localized PCa. The three-dimensional conformal radiotherapy is the technical standard. A dose of≥76Gy is recommended. Moderate hypofractionation provides short-term biochemical control comparable to conventional fractionation. In case of intermediate risk PCa, radiotherapy can be combined with short-term androgen deprivation therapy (ADT). In case of high-risk disease, long-term ADT remains the standard of care. ADT is the backbone therapy of metastatic disease. In men with metastases at first presentation, upfront chemotherapy combined with ADT should be considered as a standard. In this situation, the combination of ADT and abiraterone acetate also becomes a new standard. In case of metastatic castration-resistant PCa (mCRPC), new hormonal treatments and chemotherapy provide a better control of tumor progression and increase survival. CONCLUSION: These updated French guidelines will contribute to increase the level of urological care for the diagnosis and treatment for prostate cancer.
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Intensity-modulated radiation therapy, image-guided radiation therapy with fiducial markers and prostate brachytherapy allow the delivery of dose escalation for localized prostate cancer with very low rates of long-term toxicity and sequelae. Nowadays, modern radiotherapy techniques make it possible to shorten treatment time with hypofractionation, to better protect surrounding healthy tissues and to escalate the dose even further. Advances in radiotherapy are closely linked to advances in magnetic resonance imaging (MRI) and/or PET imaging. Functional imaging makes it possible to deliver personalised pelvic nodal radiotherapy, targeting the nodal areas at higher risk of microscopic involvement. In patients with an index lesion at baseline or at failure, MR-based focal therapy or focal dose escalation with brachytherapy or stereotactic body radiation therapy is also currently investigated. MR-based adaptive radiotherapy, which makes it possible to track prostate shifts during radiation delivery, is another step forward in the integration of MR imaging in radiation delivery.
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Neoplasias de la Próstata/radioterapia , Humanos , Invenciones , Masculino , Neoplasias de la Próstata/patología , Dosis de Radiación , Oncología por RadiaciónRESUMEN
The management of localized prostate cancer has been marked over these last years by the importance of Active Surveillance for low risk forms. Indeed, the long follow-up and the quality of the results are now sufficient to offer this option even in relatively young people. However, the question is still under investigation concerning intermediate risk of prostate cancer. Patients' selection and follow-up management are of very high importance. Another major evolution is the robotic assistance for radical prostatectomy. Even if the level of evidence is still low, the global utilization all over the world of robotic assistance is a major fact of these last years mostly explained by the difficulty to correctly perform manual laparoscopic surgical procedure. Lastly, the focal therapy of prostate cancer is a new concept. The development of this approach is authorized by the improvement of the quality of prostate MRI and the accuracy of prostate biopsy. Presently, the focal treatment has to be performed in clinical trials or maybe with the help of national database validated by all the actors concerned by the treatment of prostate cancer.
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Neoplasias de la Próstata/cirugía , Neoplasias de la Próstata/terapia , Humanos , Invenciones , Masculino , ProstatectomíaRESUMEN
INTRODUCTION: Prostate cancer brachytherapy can be used as an alternative to the radical prostatectomy and radiotherapy. In the low-risk group, specific survivals are up to 95% after 10years. The aim of the study is to describe the practices in brachytherapy in France. MATERIALS AND METHODS: A survey made by AFU (French Urologic Association) and SFRO (French Society Of Oncological Radiotherapy) assessing the practices in brachytherapy in France was sent to all the urologists and radiotherapists even if they did not practice it. RESULTS: In total, 1417 surveys were sent, 285 were received coming from 211 urologists (74%) and 74 radiotherapists (26%). Sixty (21%) practiced brachytherapy (31 urologists, 29 radiotherapists). Low dose rate with permanent implants was used in 83,3%. Brachytherapy was advised for low-risk group by 90% who responded the survey, 73% used it in intermediate risk and only 13% in high risk. CONCLUSION: Brachytherapy is hardly used in low risk prostate cancer. It probably needs a reconsideration of recommendations due to the good results in association with a good picking. The urologist-radiotherapist couple is essential in the overall care of the patient. LEVEL OF EVIDENCE: 4.
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Braquiterapia , Pautas de la Práctica en Medicina , Neoplasias de la Próstata/radioterapia , Urología , Francia , Encuestas de Atención de la Salud , Humanos , MasculinoRESUMEN
OBJECTIVES: Currently, the French High Authority for Health does not recommend mass screening for prostate cancer (PCa), due to the risk of over-treatment, notably of low risk patients. Our study is intended to reflect the therapeutic attitudes for the management of patients classified as low risk of progression in French clinical centers. METHODS: For all positive prostate biopsies performed during 2012 and 2013 in five French departments of urology, clinicopathological characteristics required to calculate the d'Amico risk group and the Cancer of the Prostate Risk Assessment (CAPRA) score were filled. Information on the first treatment of "low risk" patients was collected. RESULTS: A total of 1035 patients were included, with a median age at diagnosis of 66 years old. According to d'Amico and CAPRA classifications, 30.4% and 35.0% of patients were at low, 34.5% and 33.2% at intermediate, 35.1% and 31.8% at high risk. The diagnosis severity increased with age (P<0.0001). The main treatment for low risk patients was radical prostatectomy (41.6% and 42.0% for d'Amico and CAPRA, respectively), but active surveillance was the most frequent treatment if diagnosed after 75 years old. The management of low risk patients varied significantly between centers (P<0.0001), according to the therapeutic platforms available within the hospital. CONCLUSIONS: In absence of strong progression predictor, the management of low risk PCa remains based on center habits and local therapeutic platforms. New predictive markers, such as multiparametric MRI or molecular tests, are needed to guide rational management of low risk PCa. LEVEL OF EVIDENCE: 4.
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Pautas de la Práctica en Medicina/estadística & datos numéricos , Neoplasias de la Próstata/terapia , Medición de Riesgo , Anciano , Anciano de 80 o más Años , Francia , Humanos , Imagen por Resonancia Magnética , Masculino , Persona de Mediana Edad , Prevalencia , Antígeno Prostático Específico/sangre , Prostatectomía/estadística & datos numéricos , Neoplasias de la Próstata/clasificación , Neoplasias de la Próstata/diagnóstico por imagen , Espera VigilanteRESUMEN
Below the melting temperature Tm, crystals are the stable phase of typical elemental or molecular systems. However, cooling down a liquid below Tm, crystallization is anything but inevitable. The liquid can be supercooled, eventually forming a glass below the glass transition temperature Tg. Despite their long lifetimes and the presence of strong barriers that produces an apparent stability, supercooled liquids and glasses remain intrinsically a metastable state and thermodynamically unstable towards the crystal. Here we investigated the isothermal crystallization kinetics of the prototypical strong glassformer GeO2 in the deep supercooled liquid at 1100 K, about half-way between Tm and Tg. The crystallization process has been observed through time-resolved neutron diffraction for about three days. Data show a continuous reorganization of the amorphous structure towards the alpha-quartz phase with the final material composed by crystalline domains plunged into a low-density, residual amorphous matrix. A quantitative analysis of the diffraction patterns allows determining the time evolution of the relative fractions of crystal and amorphous, that was interpreted through an empirical model for the crystallization kinetics. This approach provides a very good description of the experimental data and identifies a predator-prey-like mechanism between crystal and amorphous, where the density variation acts as a blocking barrier.
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OBJECTIVES: The purpose of the guidelines national committee CCAFU was to propose updated french guidelines for localized and metastatic prostate cancer (PCa). METHODS: A Medline search was achieved between 2013 and 2016, as regards diagnosis, options of treatment and follow-up of PCa, to evaluate different references with levels of evidence. RESULTS: Epidemiology, classification, staging systems, diagnostic evaluation are reported. Disease management options are detailed. Recommandations are reported according to the different clinical situations. Active surveillance is a major option in low risk PCa. Radical prostatectomy remains a standard of care of localized PCa. The three-dimensional conformal radiotherapy is the technical standard. A dose of > 74Gy is recommended. Moderate hypofractionation provides short-term biochemical control comparable to conventional fractionation. In case of intermediate risk PCa, radiotherapy can be combined with short-term androgen deprivation therapy (ADT). In case of high risk disease, long-term ADT remains the standard of care. ADT is the backbone therapy of metastatic disease. In men with metastases at first presentation, upfront chemotherapy combined with ADT should be considered as a new standard. In case of metastatic castration-resistant PCa (mCRPC), new hormonal treatments and chemotherapy provide a better control of tumor progression and increase survival. CONCLUSIONS: These updated french guidelines will contribute to increase the level of urological care for the diagnosis and treatment for prostate cancer. © 2016 Elsevier Masson SAS. All rights reserved.
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Neoplasias de la Próstata/diagnóstico , Neoplasias de la Próstata/terapia , Humanos , MasculinoRESUMEN
PURPOSE: To obtain an overview of the degree of discrepancy between current clinical practice of prostate magnetic resonance imaging (MRI) in France and recommendations. MATERIALS AND METHODS: A brief survey was sent to 1229 members of the French society of urology in order to identify their indications of prostate MRI and its impact on patient management. The urologists were asked to answer several questions regarding age, practice modality, prostate MRI examinations (technique, indication before first biopsy, second biopsy, cancer staging, active surveillance, recurrence, focal therapy) and quality of reports. RESULTS: A total of 445 responses were received (participation rate of 36%). The mean delay for obtaining an appointment for prostate MRI ranged between 15-30 days in 54%. Fifty-four percent of MRI reports contained a PIRADS score and 23% a Likert score. The indications of multiparametric-MRI were tumor detection/location prior to repeat biopsy (90%), cancer staging (85%), management of patients under active surveillance (85%), selection of candidates to focal therapy (63%), tumor detection/location in biopsy naïve patients (53%), detection of local recurrence after radical (51%). Only 119 urologists (28.6%) had access to image fusion (MRI and transrectal ultrasound) and 351 (85.4%) used cognitive fusion. Mostly, targeted biopsies are done by urologists alone (nearly 80%), a very few are done by radiologists (8%) or by the two of them in collaboration (12%). CONCLUSION: The majority of urologists consider that prostate MRI is essential for the management of patients with prostate cancer. Practices are ahead of recommendations particularly before the first biopsy and in active surveillance.