1,720,969 research outputs found
Molecular pathology of endocrine gland tumors: genetic alterations and clinicopathologic relevance
Full text linkTumors of the endocrine glands are common. Knowledge of their molecular pathology has greatly advanced in the recent past. This review covers the main molecular alterations of tumors of the anterior pituitary, thyroid and parathyroid glands, adrenal cortex, and adrenal medulla and paraganglia. All endocrine gland tumors enjoy a robust correlation between genotype and phenotype. High-throughput molecular analysis demonstrates that endocrine gland tumors can be grouped into molecular groups that are relevant from both pathologic and clinical point of views. In this review, genetic alterations have been discussed and tabulated with respect to their molecular pathogenetic role and clinicopathologic implications, addressing the use of molecular biomarkers for the purpose of diagnosis and prognosis and predicting response to molecular therapy. Hereditary conditions that play a key role in determining predisposition to many types of endocrine tumors are also discussed
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
Morpho-molecular approach (NGS plus digital PCR) in diagnosis of malignant biliary strictures
Full text linkObjective: To analyze the diagnostic accuracy and feasibility of digital-PCR (dPCR) combined with next-generation sequencing (NGS) in the ERCP-guided histological diagnosis of biliary strictures to overcome the issue represented by the scarcity of sampled material. Methods: Twenty-two prospective patients were included, and submitted to ERPC-guided biopsy or biliary resection. By histopathological analysis plus fluorescence in situ hybridization (FISH) for chromosomes 3, 7, and 17 aneuploidies, 8 cases (36.4%) were malignant, and 14 cases (63.6%) were negative. NGS was performed on paraffin-embedded tissue by a laboratory-developed panel allowing the analysis of hot-spot regions in 28 genes. Digital PCR (dPCR) was performed by QuantStudioTM AbsoluteQTM solid dPCR and the copy-number variation (CNV) of the chromosomes 3, 7, and 17 analysed. Results: At dPCR, 1 case showed aneuploidy of chromosome 3, and 2 cases of both chromosomes 3 and 7. These 3 cases all belonged to the positive group (p = 0.014). At NGS, 6 cases showed at least one mutated gene, all in the positive group (p < 0.001). The 3 cases showing aneuploidy at dPCR also showed mutations at NGS. Basing on these observations, we can propose a diagnostic algorithm: dPCR can be applied first, allowing a diagnosis of malignancy in one working day if aneuploidies are observed. In the case of negative dPCR, a "second-line" NGS is performed on the same extracted material. Conclusions: The implementation of dPCR allowed the identification of nearly 40% of positive cases in just one working day. In cases of negative dPCR, the NGS procedure can start on the same extracted nucleic acid used for dPCR, requiring more time, but reaching a 75% sensitivity. More studies are required to identify other more sensitive and specific dPCR targets, but even if our algorithm does not increase diagnostic accuracy, the possibility of avoiding FISH and reaching a diagnosis in a more time- and money-saving fashion might be an important step
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
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
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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