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Nasopharynx cancer

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https://www.readbyqxmd.com/read/28259949/berberine-inhibits-the-proliferation-of-human-nasopharyngeal-carcinoma-cells-via-an-epstein-barr-virus-nuclear-antigen%C3%A2-1-dependent-mechanism
#1
Chao Wang, Huan Wang, Yaqian Zhang, Wei Guo, Cong Long, Jingchao Wang, Limei Liu, Xiaoping Sun
Nasopharyngeal carcinoma (NPC) is a malignancy derived from the epithelial cells of the nasopharynx cavity, and is closely associated with Epstein-Barr virus (EBV) infection. In addition to NPC, EBV causes various human malignancies, such as gastric cancer, hematological tumors and lymphoepithelioma-like carcinomas. Epstein-Barr nuclear antigen 1 (EBNA1) encoded by EBV is indispensable for replication, partition, transcription and maintenance of viral genomes. Berberine, a naturally occurring isoquinoline alkaloid, shows anti-inflammatory, anticholinergic, antioxidative, and anticancer activities...
March 2, 2017: Oncology Reports
https://www.readbyqxmd.com/read/28241096/the-prognostic-role-of-sex-race-and-human-papillomavirus-in-oropharyngeal-and-nonoropharyngeal-head-and-neck-squamous-cell-cancer
#2
Carole Fakhry, William H Westra, Steven J Wang, Annemieke van Zante, Yuehan Zhang, Eleni Rettig, Linda X Yin, William R Ryan, Patrick K Ha, Alicia Wentz, Wayne Koch, Jeremy D Richmon, David W Eisele, Gypsyamber D'Souza
BACKGROUND: Human papillomavirus (HPV) is a well-established prognostic marker for oropharyngeal squamous cell cancer (OPSCC). Because of the limited numbers of women and nonwhites in studies to date, sex and racial/ethnic differences in prognosis have not been well explored. In this study, survival differences were explored by the tumor HPV status among 1) patients with OPSCCs by sex and race and 2) patients with nonoropharyngeal (non-OP) head and neck squamous cell cancers (HNSCCs)...
February 27, 2017: Cancer
https://www.readbyqxmd.com/read/28214285/-local-failures-of-nasopharynx-carcinoma-anatomoclinical-aspects-and-therapeutic-results
#3
L Ghorbal, F Elloumi, W Siala, A Khabir, A Ghorbel, M Frikha, J Daoud
PURPOSE: Retrospective analysis of clinical aspects and therapeutic results of nasopharynx cancer local failures. PATIENTS AND METHODS: Forty patients with local failure with or without nodal involvement of nasopharyngeal carcinoma were treated between 1993 and 2013. Reirradiation of nasopharynx was delivered at the dose of 60Gy. Platinum-based chemotherapy was indicated in case of locally advanced disease and/or associated nodal failure. RESULTS: The mean age at diagnosis of primitive tumour was 41...
February 14, 2017: Cancer Radiothérapie: Journal de la Société Française de Radiothérapie Oncologique
https://www.readbyqxmd.com/read/28128848/head-and-neck-cancers-major-changes-in-the-american-joint-committee-on-cancer-eighth-edition-cancer-staging-manual
#4
William M Lydiatt, Snehal G Patel, Brian O'Sullivan, Margaret S Brandwein, John A Ridge, Jocelyn C Migliacci, Ashley M Loomis, Jatin P Shah
Answer questions and earn CME/CNE The recently released eighth edition of the American Joint Committee on Cancer (AJCC) Staging Manual, Head and Neck Section, introduces significant modifications from the prior seventh edition. This article details several of the most significant modifications, and the rationale for the revisions, to alert the reader to evolution of the field. The most significant update creates a separate staging algorithm for high-risk human papillomavirus-associated cancer of the oropharynx, distinguishing it from oropharyngeal cancer with other causes...
March 2017: CA: a Cancer Journal for Clinicians
https://www.readbyqxmd.com/read/28118455/trends-and-patterns-of-disparities-in-cancer-mortality-among-us-counties-1980-2014
#5
Ali H Mokdad, Laura Dwyer-Lindgren, Christina Fitzmaurice, Rebecca W Stubbs, Amelia Bertozzi-Villa, Chloe Morozoff, Raghid Charara, Christine Allen, Mohsen Naghavi, Christopher J L Murray
Introduction: Cancer is a leading cause of morbidity and mortality in the United States and results in a high economic burden. Objective: To estimate age-standardized mortality rates by US county from 29 cancers. Design and Setting: Deidentified death records from the National Center for Health Statistics (NCHS) and population counts from the Census Bureau, the NCHS, and the Human Mortality Database from 1980 to 2014 were used. Validated small area estimation models were used to estimate county-level mortality rates from 29 cancers: lip and oral cavity; nasopharynx; other pharynx; esophageal; stomach; colon and rectum; liver; gallbladder and biliary; pancreatic; larynx; tracheal, bronchus, and lung; malignant skin melanoma; nonmelanoma skin cancer; breast; cervical; uterine; ovarian; prostate; testicular; kidney; bladder; brain and nervous system; thyroid; mesothelioma; Hodgkin lymphoma; non-Hodgkin lymphoma; multiple myeloma; leukemia; and all other cancers combined...
January 24, 2017: JAMA: the Journal of the American Medical Association
https://www.readbyqxmd.com/read/28109466/definitive-proton-beam-therapy-for-adenoid-cystic-carcinoma-of-the-nasopharynx-involving-the-base-of-skull
#6
Michelle S Gentile, Darwin Yip, Norbert J Liebsch, Judith A Adams, Paul M Busse, Annie W Chan
OBJECTIVES: Management of unresectable adenocystic carcinoma (ACC) of the nasopharynx is challenging given the high dose required for tumor control while respecting dose constraints. We evaluated long-term outcomes and toxicity in patients with unresectable ACC of the nasopharynx treated with definitive proton beam therapy. METHODS: Between 2000 and 2013, 14 patients with ACC of the nasopharynx were treated. Ninety-three percent had T4 disease. All had involvement of the skull base...
February 2017: Oral Oncology
https://www.readbyqxmd.com/read/28109073/cyclin-dependent-kinase-inhibitor-3-promotes-cancer-cell-proliferation-and-tumorigenesis-in-nasopharyngeal-carcinoma-by-targeting-p27
#7
Huimin Wang, Hexin Chen, Hang Zhou, Wenfa Yu, Zhenmin Lu
Nasopharyngeal carcinoma (NPC) is a common head and neck malignancy with high invasion which arises from the nasopharynx epithelium. Cyclin-dependent kinase inhibitor 3 (CDKN3) belongs to the dual-specificity protein phosphatase family which plays a key role in regulating cell division. Abnormal expression of CDKN3 has been found in numerous types of cancer. In the current study, we explored the possible role of CDKN3 in cell proliferation, invasion ability and radiosensitivity in NPC cells. We reported that CDKN3 was upregulated and P27 was downregulated in NPC tissues and associated with worse patient prognosis...
January 20, 2017: Oncology Research
https://www.readbyqxmd.com/read/28098136/exome-and-genome-sequencing-of-nasopharynx-cancer-identifies-nf-%C3%AE%C2%BAb-pathway-activating-mutations
#8
Yvonne Y Li, Grace T Y Chung, Vivian W Y Lui, Ka-Fai To, Brigette B Y Ma, Chit Chow, John K S Woo, Kevin Y Yip, Jeongsun Seo, Edwin P Hui, Michael K F Mak, Maria Rusan, Nicole G Chau, Yvonne Y Y Or, Marcus H N Law, Peggy P Y Law, Zoey W Y Liu, Hoi-Lam Ngan, Pok-Man Hau, Krista R Verhoeft, Peony H Y Poon, Seong-Keun Yoo, Jong-Yeon Shin, Sau-Dan Lee, Samantha W M Lun, Lin Jia, Anthony W H Chan, Jason Y K Chan, Paul B S Lai, Choi-Yi Fung, Suet-Ting Hung, Lin Wang, Ann Margaret V Chang, Simion I Chiosea, Matthew L Hedberg, Sai-Wah Tsao, Andrew C van Hasselt, Anthony T C Chan, Jennifer R Grandis, Peter S Hammerman, Kwok-Wai Lo
Nasopharyngeal carcinoma (NPC) is an aggressive head and neck cancer characterized by Epstein-Barr virus (EBV) infection and dense lymphocyte infiltration. The scarcity of NPC genomic data hinders the understanding of NPC biology, disease progression and rational therapy design. Here we performed whole-exome sequencing (WES) on 111 micro-dissected EBV-positive NPCs, with 15 cases subjected to further whole-genome sequencing (WGS), to determine its mutational landscape. We identified enrichment for genomic aberrations of multiple negative regulators of the NF-κB pathway, including CYLD, TRAF3, NFKBIA and NLRC5, in a total of 41% of cases...
January 18, 2017: Nature Communications
https://www.readbyqxmd.com/read/28094052/the-association-of-cancer-risks-with-pentachlorophenol-exposure-focusing-on-community-population-in-the-areas-along-certain-section-of-yangtze-river-in-china
#9
Yanjie Cui, Ling Liang, Qi Zhong, Qian He, Xiaomei Shan, Keyang Chen, Fen Huang
Pentachlorophenol (PCP) was used in large quantities, and mainly for killing the intermediate host snails of schistosome in China, thereby resulting in ubiquitous PCP residue in the environment. However, studies considering the carcinogenicity of PCP for humans mainly focused on occupational workers, and the actual carcinogenicity of PCP for general population is uncertain. To investigate the association between cancer risks and PCP exposure in a community population, an ecological study was conducted in three contaminated areas along the Yangtze River...
January 13, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28053841/epidemiology-and-inequality-in-the-incidence-and%C3%A2-mortality-of-nasopharynx-cancer-in-asia
#10
Neda Mahdavifar, Mahshid Ghoncheh, Abdollah Mohammadian-Hafshejani, Bahman Khosravi, Hamid Salehiniya
OBJECTIVES: One of the most common head and neck cancers is nasopharynx cancer. Knowledge about the incidence and mortality of this disease and its distribution in terms of geographical areas is necessary for further study and better planning. Therefore, this study was conducted with the aim of determining the incidence and mortality rates of nasopharynx cancer and its relationship with the Human Development Index (HDI) in Asia in 2012. METHODS: The aim of this ecologic study was to assess the correlation between age-specific incidence rate (ASIR) and age-specific mortality rate (ASMR) with HDI and its components, which include the following: life expectancy at birth, mean years of schooling, and gross national income per capita...
December 2016: Osong Public Health and Research Perspectives
https://www.readbyqxmd.com/read/28048681/mo-fg-campus-tep2-02-first-experiences-and-perspectives-in-using-direct-multicriteria-optimization-mco-on-volumetric-modulated-arc-therapy-vmat-for-head-and-neck-cancer
#11
Samantha Edgington, Christopher Cotter, Paul Busse, Bruce Crawford, Yi Wang
PURPOSE: To report the first experiences and perspectives in using direct multicriteria optimization (MCO) on volumetric-modulated arc therapy (VMAT) for head and neck (H&N) cancer. METHODS: Ten prior patients with tumors in representative H&N regions were selected to evaluate direct MCO-VMAT in RayStation v5.0 beta. The patients were previously treated by intensity-modulated radiation therapy (IMRT) with MCO on an Elekta linear accelerator with Agility multileaf collimator...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047665/su-d-201-01-a-multi-institutional-study-quantifying-the-impact-of-simulated-linear-accelerator-vmat-errors-for-nasopharynx
#12
E Pogson, C Hansen, S Blake, S Arumugam, J Juresic, C Ochoa, J Yakobi, A Haman, A Trtovac, L Holloway, D Thwaites
PURPOSE: To quantify the impact of differing magnitudes of simulated linear accelerator errors on the dose to the target volume and organs at risk for nasopharynx VMAT. METHODS: Ten nasopharynx cancer patients were retrospectively replanned twice with one full arc VMAT by two institutions. Treatment uncertainties (gantry angle and collimator in degrees, MLC field size and MLC shifts in mm) were introduced into these plans at increments of 5,2,1,-1,-2 and -5. This was completed using an in-house Python script within Pinnacle3 and analysed using 3DVH and MatLab...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047287/su-f-t-384-step-and-shoot-imrt-vmat-and-autoplan-vmat-nasopharnyx-plan-robustness-to-linear-accelerator-delivery-errors
#13
E M Pogson, C Hansen, S Blake, S Arumugam, L Holloway, D Thwaites
PURPOSE: To identify the robustness of different treatment techniques in respect to simulated linac errors on the dose distribution to the target volume and organs at risk for step and shoot IMRT (ssIMRT), VMAT and Autoplan generated VMAT nasopharynx plans. METHODS: A nasopharynx patient dataset was retrospectively replanned with three different techniques: 7 beam ssIMRT, one arc manual generated VMAT and one arc automatically generated VMAT. Treatment simulated uncertainties: gantry, collimator, MLC field size and MLC shifts, were introduced into these plans at increments of 5,2,1,-1,-2 and -5 (degrees or mm) and recalculated in Pinnacle...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28034680/implementation-of-intensity-modulated-radiotherapy-for-head-and-neck-cancers-in-routine-practice
#14
C Bednarek, T V F Nguyen, M Puyraveau, É Bonnet, N Lescut, C Azélie, J Miny, O Mauvais, T Maurina, F Tochet, J-F Bosset, J Thariat, X S Sun
PURPOSE: To report on patterns of relapse following implementation of intensity-modulated radiotherapy and subsequent changes in practice in a tertiary care centre. PATIENTS AND METHODS: Between 2008 and 2011, 188 consecutive patients (mean age 59 years old) received intensity-modulated radiotherapies with curative intent for squamous cell carcinomas of the oral cavity (17.5%), oropharynx (43%), hypopharynx (21%), larynx (14%), sinonasal cavities (6%), nasopharynx (1...
December 26, 2016: Cancer Radiothérapie: Journal de la Société Française de Radiothérapie Oncologique
https://www.readbyqxmd.com/read/28019086/the-risk-of-secondary-cancer-in-nasopharyngeal-carcinoma-paediatric-patients-due-to-intensity-modulated-radiotherapy-and-mega-voltage-cone-beam-computed-tomography
#15
Reham S Sherif, Ehab M Attalla, Wael M Elshemey, Noha G Madian
INTRODUCTION: There is a growing interest in the study of radiation-induced secondary cancer. The aim of this work is (i) to estimate the peripheral doses attributable to intensity modulated radiotherapy (IMRT) and mega-voltage cone beam computed tomography (MV-CBCT) for some organs at risk (OARs) which surround the target being treated (Nasopharynx) in paediatric patients. (ii) To estimate the risk of radiation-induced secondary cancers attributable to patient setup verification imaging dose using MV-CBCT for Nasopharyngeal Carcinoma (NPC) in paediatric patients and comparing it with that attributable to the therapeutic dose using IMRT...
December 25, 2016: Journal of Medical Imaging and Radiation Oncology
https://www.readbyqxmd.com/read/27989630/-specificities-of-carcinomas-in-adolescents-and-young-adults
#16
REVIEW
Brice Fresneau, Marie-Emilie Dourthe, Anaïs Jouin, Valérie Laurence, Guénolée de Lambert, Christelle Colas, Mathilde Coret, Anne Laprie, Céleste Rebours, Daniel Orbach, Charlotte Demoor-Goldschmidt
Carcinomas are rare tumors of the adolescent-young adult (AYA) with a different spectrum from those of adults. The most common sites outside of the thyroid is the nasopharynx, salivary gland, colon-rectum and ovaries. If nasopharyngeal carcinoma or salivary gland tumors are good prognosis, others are more reserved prognosis, such as digestive carcinomas, gynecological or midline. The revelation modes are non-specific and depend on the location: mass, tumor syndrome, pain, impaired general condition. The unusual of pediatric carcinomas led to propose a systematic oncogenetic exploration...
March 2017: Bulletin du Cancer
https://www.readbyqxmd.com/read/27934959/hopx-functions-as-a-tumour-suppressor-in-head-and-neck-cancer
#17
Lee Fah Yap, Sook Ling Lai, Sathya Narayanan Patmanathan, Ravindran Gokulan, C Max Robinson, Joe B White, San Jiun Chai, Pathmanathan Rajadurai, Narayanan Prepageran, Yew Toong Liew, Victor Lopes, Wenbin Wei, Robert J Hollows, Paul G Murray, Daniel W Lambert, Keith D Hunter, Ian C Paterson
Head and neck squamous cell carcinoma (HNSCC) is generalized term that encompasses a diverse group of cancers that includes tumours of the oral cavity (OSCC), oropharynx (OPSCC) and nasopharynx (NPC). Genetic alterations that are common to all HNSCC types are likely to be important for squamous carcinogenesis. In this study, we have investigated the role of the homeodomain-only homeobox gene, HOPX, in the pathogenesis of HNSCC. We show that HOPX mRNA levels are reduced in OSCC and NPC cell lines and tissues and there is a general reduction of HOPX protein expression in these tumours and OPSCCs...
December 9, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27930766/differences-in-the-prevalence-of-human-papillomavirus-hpv-in-head-and-neck-squamous-cell-cancers-by-sex-race-anatomic-tumor-site-and-hpv-detection-method
#18
Gypsyamber D'Souza, William H Westra, Steven J Wang, Annemieke van Zante, Alicia Wentz, Nicole Kluz, Eleni Rettig, William R Ryan, Patrick K Ha, Hyunseok Kang, Justin Bishop, Harry Quon, Ana P Kiess, Jeremy D Richmon, David W Eisele, Carole Fakhry
Importance: Human papillomavirus (HPV) causes an increasing proportion of oropharyngeal squamous cell carcinomas (OPSCCs), particularly in white men. The prevalence of HPV among other demographic groups and other anatomic sites of HNSCC is unclear. Objective: To explore the role of HPV tumor status among women and nonwhites with OPSCC and patients with nonoropharyngeal head and neck squamous cell carcinoma (non-OP HNSCC). Design, Setting, and Participants: Retrospective cohort study at 2 tertiary academic centers including cases diagnosed 1995 through 2012, oversampled for minorities and females...
December 8, 2016: JAMA Oncology
https://www.readbyqxmd.com/read/27889184/gec-estro-acrop-recommendations-for-head-neck-brachytherapy-in-squamous-cell-carcinomas-1st-update-improvement-by-cross-sectional-imaging-based-treatment-planning-and-stepping-source-technology
#19
György Kovács, Rafael Martinez-Monge, Ashwini Budrukkar, Jose Luis Guinot, Bengt Johansson, Vratislav Strnad, Janusz Skowronek, Angeles Rovirosa, Frank-André Siebert
The Head and Neck Working Group of the GEC-ESTRO (Groupe Européen de Curiethérapie - European Society for Therapeutic Radiology and Oncology) published in 2009 the consensus recommendations for low-dose rate, pulsed-dose rate and high-dose rate brachytherapy in head & neck cancers. The use of brachytherapy in combination with external beam radiotherapy and/or surgery was also covered as well as the use of brachytherapy in previously irradiated patients. Given the developments in the field, these recommendations needed to be updated to reflect up-to-date knowledge...
February 2017: Radiotherapy and Oncology: Journal of the European Society for Therapeutic Radiology and Oncology
https://www.readbyqxmd.com/read/27875901/reducing-radiation-related-morbidity-in-the-treatment-of-nasopharyngeal-carcinoma
#20
REVIEW
Jason W Chan, Upendra Parvathaneni, Sue S Yom
While radiation therapy is the mainstay of treatment for nasopharyngeal carcinoma, the anatomic location of the nasopharynx in close proximity to radiation-sensitive organs such as the salivary glands, optic nerves and chiasm, cochlea, brainstem and temporal lobes presents a special challenge. Technological approaches to reducing the morbidity of nasopharyngeal cancer irradiation have been historically successful with the evolution from 2D techniques to increasingly conformal forms of radiation therapy. This report reviews normal tissue dose constraints and major considerations in target delineation for patients with nasopharyngeal cancer in the intensity-modulated radiation therapy era...
February 2017: Future Oncology
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