1,720,969 research outputs found
Uniportal Thoracoscopic Thoracic Duct Clipping in Poirier's Triangle for Postoperative Chylothorax
No full textPostoperative chylothorax is a rare but potentially life-threatening complication. Conservative treatment is usually unsuccessful in patients with high-output chylothorax, for whom early surgical thoracic duct ligation has been advocated to minimize morbidity and mortality. This report describes left uniportal thoracoscopic closure of persistent high-output chylothorax through Poirier's triangle in a patient undergoing thoracoscopic thymectomy. After resection of pleural adhesions, the mediastinal pleura was resected at the level of the aortic arch, left subclavian artery, and vertebral column, the anatomic limits of Poirier's triangle. The thoracic duct was then isolated from the esophagus and successfully clipped along its path
Surgical treatment of solitary sternal metastasis from breast cancer Case report
Full text linkBone metastasis is a frequent and early complication of breast cancer. This case report describes a technique for a partial exeresis of the sternum and the reconstruction of the pleura with autologous dermis from the lower abdomen and the loss of substance with a myocutaneous flap
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
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
Nodular histiocytic/mesothelial hyperplasia as consequence of chronic mesothelium irritation by sub-phrenic abscess.
Full text linkNodular histiocytic/mesothelial hyperplasia (NHMH) is a benign localized alteration, first
described in 1975 by Rosai in the hernia sac [1]. Few pulmonary cases have been reported in literature
[2–6]. Sometimes it has been reported in the pericardium [7,8] or presenting as an inguinal
mass [9]. The ‘mesothelial/monocytic incidental cardiac excrescence’, first described by Weinot et al.
in 1994 [10] is now considered a similar lesion to NHMH [11].
It consists of a reactive proliferation of histiocytes and mesothelium secondary to chronic irritation
and it has been observed in pleura-damaging processes, such as pneumothorax [5], or as consequence
of cardiac catheterization, inflammation, mechanical or tumor stimulation [11].
The rarity of NHMH and the moderate cytological atypia often present, make this lesion difficult
to diagnose. It can be easily confused with primary mesothelial lesions and neoplasms such
as adenocarcinomas, granulosa cell tumors or Langerhans’ histiocytosis.
We report a case of pleural NHMH in a patient with a subphrenic abscess, in which no pulmonary
pathogenic noxa was evident. We hypothesize a transdiaphragmatic chronic irritation as a
pathogenetic mechanism underlying NHMH
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