1,720,968 research outputs found
Author's reply to “Letter to the editor: Surgical resection of oral cancer: en-bloc versus discontinuous approach”
Full text linksurgical resection of oral cancer can be by en-bloc or discontinuous approach
Disposable chlorine dioxide wipes for high-level disinfection in the ENT department: A systematic review
Full text linkBackground: Nasopharyngoscope reprocessing methods should be effective, rapid and reproducible with moderate cost. Tristel Trio Wipes system (TTWS) is a manual reprocessing method based on chlorine dioxide that has lately emerged in ENT department. This review aims to collect evidence on this system. Methods: The PubMed, Web of Science and Cochrane Library databases were searched for all the studies on TTWS or one of its components. Data were grouped according to the study type. Results: Ten articles were included in the review. TTWS ensured high-level disinfection in laboratory and clinical setting. Although the limitations of the manual systems, TTWS proved to be faster than automated endoscope reprocessing (AER) and safe for patients and health-care workers. TTWS represented cheaper system than AER or sheaths in low- and medium-volume centers. Conclusion: TTWS could be a valid, safe and fast HLD method for nasopharyngoscopes, with reasonable costs for medium-low reprocessing volumes
Relevance of perimarginal nodes for head and neck cancer
Full text linkObjective: To estimate the prevalence of metastasis in the perimarginal nodes (PMNs) (also known as perifacial, preglandular and retroglandual nodes) in head and neck cancer. Methods: We recruited 136 patients affected by cancers of the oral cavity, lip, oropharynx, skin and by cáncer of unknown primary (CUP), who were candidates for level IB dissection. PMNs were identified and sent separately for histological analysis. Correlation between metastasis to the PMNs and characteristics of the primary tumour were reported. Results: The incidence of metastasis was 17% from oral cancer, 50% from lip cancer and 12.5% from skin cancer. No metastases were reported for oropharynx cancer or CUP. The only factor that correlated with the incidence of metastases was origin of the tumour from the upper part of oral cavity. Conclusion: PMNs represent a frequent site of metastasis in oral and lip cancers. In cancer of the oropharynx, their involvement has not been not reported, while their role in skin cancers remains to be clarified
Surgical resection of oral cancer: en-bloc versus discontinuous approach
Full text linkObjectives: In the past literature agreed on treating oral carcinomas, using an “en-bloc” resection (EBR) but recently minimally invasive transoral surgery has spread as the preferable treatment for selected cases. This latter technique, which is performed with a discontinuous resection (DR), allows for a satisfactory postoperative quality of life (QoL) maintaining good survival rates. Materials and methods: In this study, we analyzed data about 147 surgically treated patients with oral cancer involving tongue and floor of the mouth. The sample was divided according to the surgical approach: EBR and DR group which were compared in terms of recurrence, overall survival, disease-free survival, and QoL. Results: In the DR group, survival analysis showed better results in term of survival, locoregional control, and postoperative anxiety, while the other QoL scores were similar in the two groups. Conclusion: The more invasive approach does not correlate to a better outcome. In selected cases, DR is an oncologically safe technique; EBR is still a valid option to treat advanced oral cancers
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Tailored resections in oral and oropharyngeal cancer using narrow band imaging
No full textPurpose: In a previous pilot study we observed that intra-operative narrow-band imaging (NBI) helps achieve clear superficial resection margins. The aim of this study was to verify if the use of intra-operative NBI can help to obtain tailored resections and if it is influenced by the lesion site, aspects not investigated in our previous study. Materials and methods: The resection margins of 39 oral and 22 oropharyngeal squamous cell carcinomas were first set at 1.5 cm from the macroscopic lesion boundary (white light, WL, tattoo). Then, the superficial tumor extension was more precisely defined with NBI, giving rise to three possible situations: NBI tattoo larger than the WL tattoo, NBI tattoo coinciding with the WL tattoo, or NBI tattoo smaller than the WL tattoo. For each of these situations the space comprised between the NBI and WL tattoos was defined “NBI positive”, “NBI null”, and “NBI negative”, respectively. Resections were performed following the outer tattoo. The number of clear superficial resection margins, and the pathological response on the “NBI-positive” and the “NBI-negative” areas were recorded. Results: We obtained 80.3% negative superficial resection margins. NBI provided a more precise definition of superficial tumor extension in 43 patients. Sensitivity, specificity, positive and negative predictive values were 94.4%, 64%, 79.1% and 88.9%, respectively; a test of proportions demonstrated they were not influenced by tumor site. Conclusions: NBI could allow for real-time definition of superficial tumor extension with possible tailored resections and fewer positive superficial resection margins; it is not influenced by tumor site
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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