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https://www.readbyqxmd.com/read/27921116/-the-pressure-equalizing-function-of-the-eustachian-tube-evaluation-in-a%C3%A2-hypo-hyperbaric-pressure-chamber
#1
S Jansen, M F Meyer, K-B Hüttenbrink, D Beutner
BACKGROUND: The Eustachian tube connects the tympanic cavity (cavum tympani) and the nasopharynx, and enables pressure equalization between the middle ear and ambient pressure. Functional pressure compensation is very important for flying and diving in particular, due to non-physiologically large pressure differences. OBJECTIVE: Evaluation of the pressure-equalizing function of the Eustachian tube is still a clinical challenge. This review article evaluates the existing data...
December 5, 2016: HNO
https://www.readbyqxmd.com/read/27919900/n-acetyl-l-cysteine-and-cysteamine-new-strategies-against-mixed-biofilms-of-non-encapsulated-streptococcus-pneumoniae-and-non-typeable-haemophilus-influenzae
#2
Mirian Domenech, Ernesto García
Acute otitis media, a polymicrobial disease of the middle ear cavity of children, is a significant public health problem worldwide. It is most frequently caused by encapsulated Streptococcus pneumoniae and non-typeable Haemophilus influenzae, although the widespread use of pneumococcal conjugate vaccines is apparently producing an increase in carriage of non-encapsulated S. pneumoniae Frequently, pneumococci and H. influenzae live together in the human nasopharynx forming a self-produced biofilm. Biofilms represent a global medical challenge since the inherent antibiotic resistance of their producers demands the use of high doses of antibiotics over prolonged periods...
December 5, 2016: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/27918720/what-is-the-best-treatment-of-locally-advanced-nasopharyngeal-carcinoma-an-individual-patient-data-network-meta-analysis
#3
Laureen Ribassin-Majed, Sophie Marguet, Anne W M Lee, Wai Tong Ng, Jun Ma, Anthony T C Chan, Pei-Yu Huang, Guopei Zhu, Daniel T T Chua, Yong Chen, Hai-Qiang Mai, Dora L W Kwong, Shie-Lee Cheah, James Moon, Yuk Tung, Kwan-Hwa Chi, George Fountzilas, Jean Bourhis, Jean Pierre Pignon, Pierre Blanchard
Purpose The role of adjuvant chemotherapy (AC) or induction chemotherapy (IC) in the treatment of locally advanced nasopharyngeal carcinoma is controversial. The individual patient data from the Meta-Analysis of Chemotherapy in Nasopharynx Carcinoma database were used to compare all available treatments. Methods All randomized trials of radiotherapy (RT) with or without chemotherapy in nonmetastatic nasopharyngeal carcinoma were considered. Overall, 20 trials and 5,144 patients were included. Treatments were grouped into seven categories: RT alone (RT), IC followed by RT (IC-RT), RT followed by AC (RT-AC), IC followed by RT followed by AC (IC-RT-AC), concomitant chemoradiotherapy (CRT), IC followed by CRT (IC-CRT), and CRT followed by AC (CRT-AC)...
December 5, 2016: Journal of Clinical Oncology: Official Journal of the American Society of Clinical Oncology
https://www.readbyqxmd.com/read/27917891/modular-architecture-and-unique-teichoic-acid-recognition-features-of-choline-binding-protein-l-cbpl-contributing-to-pneumococcal-pathogenesis
#4
Javier Gutiérrez-Fernández, Malek Saleh, Martín Alcorlo, Alejandro Gómez-Mejía, David Pantoja-Uceda, Miguel A Treviño, Franziska Voß, Mohammed R Abdullah, Sergio Galán-Bartual, Jolien Seinen, Pedro A Sánchez-Murcia, Federico Gago, Marta Bruix, Sven Hammerschmidt, Juan A Hermoso
The human pathogen Streptococcus pneumoniae is decorated with a special class of surface-proteins known as choline-binding proteins (CBPs) attached to phosphorylcholine (PCho) moieties from cell-wall teichoic acids. By a combination of X-ray crystallography, NMR, molecular dynamics techniques and in vivo virulence and phagocytosis studies, we provide structural information of choline-binding protein L (CbpL) and demonstrate its impact on pneumococcal pathogenesis and immune evasion. CbpL is a very elongated three-module protein composed of (i) an Excalibur Ca(2+)-binding domain -reported in this work for the very first time-, (ii) an unprecedented anchorage module showing alternate disposition of canonical and non-canonical choline-binding sites that allows vine-like binding of fully-PCho-substituted teichoic acids (with two choline moieties per unit), and (iii) a Ltp_Lipoprotein domain...
December 5, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27914087/in-vitro-and-in-vivo-biofilm-formation-by-pathogenic-streptococci
#5
Yashuan Chao, Caroline Bergenfelz, Anders P Håkansson
This manuscript presents novel approaches to grow and evaluate Streptococcal biofilm formation using the human respiratory pathogen Streptococcus pneumoniae (the pneumococcus) as the main model organism on biological surfaces in vitro and in vivo. Most biofilm models are based on growth on abiotic surfaces, which is relevant for many pathogens whose growth on surfaces or medical devices is a major cause of disease transmission and infections, especially in hospital environments. However, most infections with commensal organisms require biofilm formation on biological surfaces in the host at the site of colonization or infection...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/27906102/radiation-induced-osteosarcoma-of-the%C3%A2-skull-base-after-radiation-therapy-in-a-patient-with-nasopharyngeal-carcinoma-a%C3%A2-case-report-and-review-of-the%C3%A2-literature
#6
Yassine Echchikhi, Hasna Loughlimi, Asmae Touil, Tayeb Kebdani, Noureddine Benjaafar
BACKGROUND: Radiation-induced osteosarcomas are a recognized complication of radiation therapy. Owing to the fact that it is rare, publications on radiation-induced osteosarcoma of the skull base are limited to a small series and some case reports. CASE PRESENTATION: We describe a rare case of a patient with a skull base radiation-induced osteosarcoma treated 11 years before with ionizing radiation for an undifferentiated carcinoma of the nasopharynx. The patient was treated with chemotherapy alone, but he died after the third cycle...
December 1, 2016: Journal of Medical Case Reports
https://www.readbyqxmd.com/read/27894542/effect-of-orthodontic-treatment-on-the-upper-airway-volume-in-adults
#7
Benjamin T Pliska, Isaac T Tam, Alan A Lowe, Alisa M Madson, Fernanda R Almeida
INTRODUCTION: The aim of this study was to examine the effects of orthodontic treatment with and without extractions on the anatomic characteristics of the upper airway in adults. METHODS: For this retrospective study, the pretreatment and posttreatment cone-beam computed tomography scans of 74 adult patients meeting defined eligibility criteria were analyzed. Imaging software was used to segment and measure upper airway regions including the nasopharynx, the retropalatal, and retroglossal areas of the oropharynx, as well as the total airway...
December 2016: American Journal of Orthodontics and Dentofacial Orthopedics
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
#8
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...
November 23, 2016: Radiotherapy and Oncology: Journal of the European Society for Therapeutic Radiology and Oncology
https://www.readbyqxmd.com/read/27878362/a-3-d-analysis-of-the-protympanum-in-human-temporal-bones-with-chronic-ear-disease
#9
Henrique F Pauna, Rafael C Monsanto, Patricia Schachern, Michael M Paparella, Sebahattin Cureoglu
Eustachian tube dysfunction is believed to be an important factor to cholesteatoma development and recurrence of disease after surgical treatment. Although many studies have described prognostic factors, evaluation methods, or surgical techniques for Eustachian tube dysfunction, they relied on the soft tissues of its structure; little is known about its bony structure-the protympanum-which connects the Eustachian tube to the tympanic cavity, and can also be affected by several inflammatory conditions, both from the middle ear or from the nasopharynx...
November 22, 2016: European Archives of Oto-rhino-laryngology
https://www.readbyqxmd.com/read/27877233/the-impact-of-clinical-stage-on-radiation-doses-to-organs-at-risk-following-intensity-modulated-radiotherapy-in-nasopharyngeal-carcinoma-a-prospective-analysis
#10
Lin Xu, Ji-Jin Yao, Guan-Qun Zhou, Wang-Jian Zhang, Guo-Long Liu, Li-Zhi Liu, Jun Ma, Ying Sun
Background: The development of intensity-modulated radiotherapy (IMRT) has revolutionized the management of nasopharyngeal carcinoma (NPC). The purpose of this study was to investigate the impact of clinical stage on radiation doses to organs at risk (OARs) in NPC. Material and Methods: One hundred and forty-eight patients with newly diagnosed and untreated NPC were prospectively enrolled. Based on the anatomic definition and pathogenesis of radiation induced injury, a total of 28 OARs surrounding the nasopharynx were contoured on axial computed tomography (CT) planning images in each patient...
2016: Journal of Cancer
https://www.readbyqxmd.com/read/27876743/-the-possibilities-for-the-rational-pharmacotherapy-of-adenoiditis-in-the-children
#11
E P Karpova, D V Kharina
The available literature data give evidence that viral infection is the main cause underlying the development of inflammatory nasopharyngeal pathology in the children. According to ICD-10, nether acute nor chronic adenoiditis should be considered as a self-consistent nosological entity. Acute adenoiditis is usually regarded as a form of acute nasopharyngitis (J02) or acute respiratory viral infection (J06.9) whereas chronic adenoiditis is commonly referred to as representing other chronic diseases of the tonsils and adenoids (J 35...
2016: Vestnik Otorinolaringologii
https://www.readbyqxmd.com/read/27875901/reducing-radiation-related-morbidity-in-the-treatment-of-nasopharyngeal-carcinoma
#12
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...
November 23, 2016: Future Oncology
https://www.readbyqxmd.com/read/27872615/microbial-communities-of-conducting-and-respiratory-zones-of-lung-transplanted-patients
#13
Marie Beaume, Vladimir Lazarevic, Thilo Köhler, Nadia Gaïa, Oriol Manuel, John-David Aubert, Loïc Baerlocher, Laurent Farinelli, Paola Gasche, Jacques Schrenzel, Christian van Delden
Background: Lung transplantation (LT) is a recognized treatment for end-stage pulmonary disease. Bacteria from the recipient nasopharynx seed the new lungs leading to infections and allograft damage. Understanding the characteristics and topological variations of the microbiota may be important to apprehend the pathophysiology of allograft dysfunction. Objectives: To examine the characteristics and relationship of bacterial compositions between conducting and respiratory zones of the allograft. Methods: We performed 16S rRNA gene sequencing on bronchial aspirates (BAs) and bronchoalveolar lavages (BALs) collected in pairs in 19 patients at several time-points post-LT...
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/27865564/pneumococcal-pep27-mutant-immunization-stimulates-cytokine-secretion-and-confers-long-term-immunity-with-a-wide-range-of-protection-including-against-non-typeable-strains
#14
Gyu-Lee Kim, Sang-Yoon Choi, Seung-Han Seon, Seungyeop Lee, Sang-Sang Park, Joon Young Song, David E Briles, Dong-Kwon Rhee
Streptococcus pneumoniae is comprised of more than 90 serotypes and is the major causative agent of pneumonia, which results in over 1million deaths worldwide every year. Currently available injectable vaccines can protect against only 13-23 serotypes, and result in decrease of colonization against vaccine serotypes. However, they are neither effective for inhibition of non-vaccine serotypes colonization nor inhibition against initial colonization in the nasopharynx against various serotypes. Thus, development of a vaccine conveying broader protection at the colonization stage is required...
December 12, 2016: Vaccine
https://www.readbyqxmd.com/read/27861618/meningococcal-carriage-among-adolescents-after-mass-meningococcal-c-conjugate-vaccination-campaigns-in-salvador-brazil
#15
Amélia Maria Pithon Borges Nunes, Guilherme Sousa Ribeiro, Ítalo Eustáquio Ferreira, Ana Rafaela Silva Simões Moura, Ridalva Dias Martins Felzemburgh, Ana Paula Silva de Lemos, Mitermayer Galvão Reis, José Cassio de Moraes, Leila Carvalho Campos
Neisseria meningitidis is a commensal bacterium of the human nasopharynx. In rare cases, it penetrates the mucosa, entering the blood stream and causing various forms of disease. Meningococcal conjugate vaccines can prevent invasive disease not only by direct effect in vaccinated individuals but also by herd protection, preventing acquisition of carriage, which interrupts transmission and leads to protection of unvaccinated persons. In 2010 in Salvador, Brazil, an outbreak of group C meningococcal disease led to a mass meningococcal serogroup C conjugate vaccination drive, targeting those <5 and 10-24 years of age...
2016: PloS One
https://www.readbyqxmd.com/read/27853500/septochoanal-polyp-with-metaplastic-ossification-mimicking-sinonasal-tumor-a-case-report
#16
Il-Young Cho, Jae-Wook Kim, Hak-Jin Kim, Kyu-Sup Cho
Choanal polyps are a form of nasal polyps that grow toward the choana with a single stalk. Septochoanal polyp is a rare entity that originates from the mucosa of the nasal septum with choanal extension. The most common site of its origin is mainly the superior aspect of the posterior portion of the nasal septum. However, metaplastic ossification is a rare event in nasal polyp and to the best of our knowledge, septochoanal polyp with metaplastic ossification has not been reported in the literature. Herein, we report a case of huge septochoanal polyp with metaplastic ossification obstructing both the nasal cavity and nasopharynx, which was successfully removed via transnasal endoscopic approach...
July 2016: Iranian Journal of Radiology: a Quarterly Journal Published By the Iranian Radiological Society
https://www.readbyqxmd.com/read/27852681/interesting-case-of-base-of-skull-mass-infiltrating-cavernous-sinuses
#17
Achintya Dinesh Singh, Manish Soneja, Saba Samad Memon, Surabhi Vyas
A man aged 35 years presented with chronic headache and earache of 1-year duration. He had progressive vision loss and diplopia since last 9 months. He also had pain over the face and episodic profuse epistaxis. On examination, perception of light was absent in the right eye and hand movements were detected at 4 m distance in the left eye. Imaging revealed a lobulated mass in the nasopharynx extending into the bilateral cavernous sinuses and sphenoid sinus with bony erosions. Biopsy of the nasopharyngeal mass revealed pathological features which are characteristic of IgG4 disease...
November 16, 2016: BMJ Case Reports
https://www.readbyqxmd.com/read/27849340/intra-arterial-cetuximab-for-the-treatment-of-recurrent-unresectable-head-and-neck-squamous-cell-carcinoma-%C3%A2
#18
Tristan Tham, Timothy G White, Shamik Chakraborty, Rohan R Lall, Rafael Ortiz, David J Langer, Deborah Shatzkes, Christopher G Filippi, Dennis Kraus, John A Boockvar, Peter D Costantino
IMPORTANCE: Management of recurrent head and neck squamous cell carcinoma is a common and challenging clinical problem in head and neck oncology. OBJECTIVE: Here we present the first reported case of super-selective intra-arterial (SSIA) microcatheter based local delivery of cetuximab for head and neck cancer. This technical report describes the techniques used to deliver the SSIA dose of cetuximab, as well as the patient outcome. DESIGN: This technical report is part of an ongoing Phase I Clinical Trial...
November 2016: Journal of Experimental Therapeutics & Oncology
https://www.readbyqxmd.com/read/27833652/molecular-detection-of-epstein-barr-virus-in-nasopharyngeal-carcinoma-among-sudanese-population
#19
Ali Edreis, Mona Ali Mohamed, Nouh S Mohamed, Emmanuel E Siddig
BACKGROUND: Nasopharyngeal carcinoma (NPC) is the most common cancer arising from the nasopharynx that varies significantly from other cancers of the head and neck in its occurrence, causes, clinical behavior, and treatment. NPC caused by an interaction between infection with EBV and environmental and genetic factors, encompasses a multistep oncogenic process. The frequency of Epstein-Barr virus EBV among nasopharyngeal carcinoma is well known worldwide, however, in the Sudan there is barely a published data...
2016: Infectious Agents and Cancer
https://www.readbyqxmd.com/read/27832924/nasopharyngectomy-with-operating-microscope-a-case-series
#20
Jia Hui Jang, Hiang Khoon Tan, N Gopalakrishna Iyer, Khee Chee Soo, Ngian Chye Tan
BACKGROUND: Nasopharyngectomy for excision of nasopharyngeal tumors is challenging, as access to the nasopharynx is difficult. Recently our institution embarked on two new approaches - robotic nasopharyngectomy and open nasopharyngectomy with operating microscope (NOM) via maxillary swing approach. This article proposes that the novel approach of NOM via maxillary swing aids visualization for resection of locally invasive nasopharyngeal tumors. METHODS: Over a thirteen-month period, eight patients required nasopharyngectomy in our single Asian institution...
September 25, 2016: American Journal of Otolaryngology
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