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      Prognostic value of neutrophil-to-lymphocyte ratio in urothelial carcinoma of the upper urinary tract and bladder: a systematic review and meta-analysis

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          Abstract

          The neutrophil-to-lymphocyte ratio (NLR) is an inflammation marker that has prognostic value for various tumors, but its prognostic value in urothelial carcinoma (UC) remains controversial. This meta-analysis investigated the prognostic value of NLR in UC. A systematic search was performed on PubMed, ISI Web of Science, and Embase for studies focusing on the association between NLR and clinical features or prognosis of UC and published until November 2016. Prognostic outcomes and clinical features were collected and analyzed. A total of 11,538 patients from 32 studies were included in the meta-analysis. Increased pretreatment NLR predicted poor overall survival (hazard ratio [HR] = 1.72, 95% confidence interval [CI] = 1.45–2.05), progression free survival (HR = 1.68, 95% CI = 1.44–1.96), and cancer specific survival (HR = 1.64, 95% CI = 1.39–1.93) in all the patients. The increased pretreatment NLR was correlated with increased lymphovascular invasion (HR = 1.29, 95% CI = 1.17–1.43), high tumor T stage (HR = 1.25, 95% CI = 1.12–1.39), and tumor grade (HR = 1.07, 95% CI = 1.01–1.14) but not with lymph node involvement, carcinoma in situ, multifocality, or positive margin. Our meta-analysis indicated that NLR could predict the prognosis for UC and was associated with UC progression in terms of lymphovascular invasion, tumor T stage, and tumor grade.

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          Obesity and Cancer Mechanisms: Tumor Microenvironment and Inflammation

          Purpose There is growing evidence that inflammation is a central and reversible mechanism through which obesity promotes cancer risk and progression. Methods We review recent findings regarding obesity-associated alterations in the microenvironment and the local and systemic mechanisms through which these changes support tumor growth. Results Locally, hyperadiposity is associated with altered adipose tissue function, adipocyte death, and chronic low-grade inflammation. Most individuals who are obese harbor inflamed adipose tissue, which resembles chronically injured tissue, with immune cell infiltration and remodeling. Within this distinctly altered local environment, several pathophysiologic changes are found that may promote breast and other cancers. Consistently, adipose tissue inflammation is associated with a worse prognosis in patients with breast and tongue cancers. Systemically, the metabolic syndrome, including dyslipidemia and insulin resistance, occurs in the setting of adipose inflammation and operates in concert with local mechanisms to sustain the inflamed microenvironment and promote tumor growth. Importantly, adipose inflammation and its protumor consequences can be found in some individuals who are not considered to be obese or overweight by body mass index. Conclusion The tumor-promoting effects of obesity occur at the local level via adipose inflammation and associated alterations in the microenvironment, as well as systemically via circulating metabolic and inflammatory mediators associated with adipose inflammation. Accurately characterizing the obese state and identifying patients at increased risk for cancer development and progression will likely require more precise assessments than body mass index alone. Biomarkers of adipose tissue inflammation would help to identify high-risk populations. Moreover, adipose inflammation is a reversible process and represents a novel therapeutic target that warrants further study to break the obesity-cancer link.
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            Prognostic factors in upper urinary tract urothelial carcinomas: a comprehensive review of the current literature.

            The heterogeneity of upper tract urothelial carcinoma (UTUC) biology and prognosis, as well as the presence of different treatment options, makes the clinical decision-making process extremely challenging. Provide an overview of the currently available prognostic factors for UTUC, focusing on clinical and pathologic characteristics, as well as on molecular markers. A systematic literature search was conducted using the PubMed, Scopus, and Embase databases to identify original articles, review articles, and editorials regarding prognostic factors in patients with UTUC. Keywords included urothelial carcinoma, renal pelvis, ureter, upper urinary tract urothelial carcinoma, upper urinary tract transitional cell carcinoma, prognosis, prognostic factors, markers, and survival. Articles published between 2000 and 2011 were reviewed and selected with the consensus of all the authors. Prognostic factors can be divided into four different categories: preoperative/clinical factors, intraoperative/surgical factors, postoperative/pathologic factors, and molecular markers. Because of the rarity of the disease, only a small amount of level 1 evidence information from prospective randomized trials is available. Conversely, several single-institutional and multi-institutional studies have been published providing level 3 evidence information on various prognostic factors. Tumor stage and grade represent the best-established predictors of prognosis in patients with UTUC, but controversies still exist regarding the prognostic impact of tumor location and tumor necrosis. Several promising biomarkers have also been evaluated, but further studies evaluating their prognostic role are still needed. Finally, few prognostic models have been developed to provide clinicians with accurate estimates of the outcome of interest. In the past few years, several prognostic factors have been identified to help clinicians dealing with patients with UTUC in the decision-making process. However, well-designed multi-institutional studies are still needed to provide stronger evidence and to promote the use of these prognostic factors in clinical practice. Copyright © 2012 European Association of Urology. All rights reserved.
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              ICUD-EAU International Consultation on Bladder Cancer 2012: Radical cystectomy and bladder preservation for muscle-invasive urothelial carcinoma of the bladder.

              New guidelines of the International Consultation on Urological Diseases for the treatment of muscle-invasive bladder cancer (MIBC) have recently been published. To provide a comprehensive overview of the current role of radical cystectomy (RC) in MIBC. A detailed Medline analysis was performed for original articles addressing the role of RC with regard to indication, timing, surgical extent, perioperative morbidity, oncologic outcome, and follow-up. The analysis also included radiation-based bladder-preserving strategies. The major findings are presented in an evidence-based fashion and are based on large retrospective unicenter and multicenter series with some prospective data. Open RC is the standard treatment for locoregional control of MIBC. Delay of RC is associated with reduced cancer-specific survival. In males, standard RC includes the removal of the bladder, prostate, seminal vesicles, and distal ureters; in females, RC includes an anterior pelvic exenteration including the bladder, entire urethra and adjacent vagina, uterus, and distal ureters. A procedure sparing the urethra and the urethra-supplying autonomous nerves can be performed in case of a planned orthotopic neobladder. Further technical variations (ie, seminal-sparing or vaginal-sparing techniques) aimed at improving functional outcomes must be weighed against the risk of a positive margin. Laparoscopic surgery is promising, but long-term data are required prior to accepting it as an option equivalent to the open procedure. Lymphadenectomy should remove all lymphatic tissue around the common iliac, external iliac, internal iliac, and obturator region bilaterally. Complications after RC should be reported according to the modified Clavien grading system. In selected patients with MIBC, bladder-preserving therapy with cystectomy reserved for tumor recurrence represents a safe and effective alternative to immediate RC. Copyright © 2012 European Association of Urology. Published by Elsevier B.V. All rights reserved.
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                Author and article information

                Journal
                Oncotarget
                Oncotarget
                Oncotarget
                ImpactJ
                Oncotarget
                Impact Journals LLC
                1949-2553
                22 September 2017
                27 April 2016
                : 8
                : 37
                : 62681-62692
                Affiliations
                1 Department of Urology, State Key Laboratory of Kidney Disease, Chinese PLA Medical Academy, Chinese People’s Liberation Army General Hospital, Beijing, China
                Author notes
                Correspondence to : Xu Zhang, xzhang@ 123456tjh.tjmu.edu.cn
                [*]

                These authors have contributed equally to this work

                Article
                17467
                10.18632/oncotarget.17467
                5617540
                28977980
                4c4ff6a2-1004-4ec5-8d80-c2050ad7b51f
                Copyright: © 2017 Li et al.

                This is an open-access article distributed under the terms of the Creative Commons Attribution License 3.0 (CC BY 3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

                History
                : 13 June 2016
                : 20 February 2017
                Categories
                Clinical Research Paper

                Oncology & Radiotherapy
                inflammation,neutrophil-to-lymphocyte ratio,urothelial cancer,prognosis,meta-analysis

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