1,720,974 research outputs found
Duodenal Diverticula: Unusual Case of Upper Gastrointestinal Obstruction
No full textA 78-year-old woman came to our attention with an 18- month history of delayed postprandial nausea and vomiting associated with significant weight loss (about 20 kg in the past year). The patient denied a previous history of abdomi- nal pain or discomfort. She had never undergone an abdom- inal surgical procedure. She was on corticosteroids and tocilizumab for rheumatoid arthritis
Primary anorectal melanoma: a case of 5 year disease-free survival
No full textAnorectal melanoma is a rare cause of anorectal malignancies affecting mainly elderly people without significant gender differences, although there seems to be a white predominance. Diagnosis is often challenging, since symptoms are frequently nonspecific. Radical surgery is the mainstay of treatment, while adjuvant therapies are generally of limited value. Thus, prognosis is still grim, with a 5-year survival rate of less than 20%. We report the case of a 75-year-old white female presenting with mild anal pain and blood in stools. Diagnosed with an ulcerated melanoma of the perianal area, she eventually underwent an abdominoperineal resection and bilateral inguinal lymphadenectomy. To date, she is currently alive and disease-free. Given the lack of adequate international guidelines, we recommend defining a tailored treatment by thorough multidisciplinary discussion, as well as taking into account the patient personal preference
Non-operative management of rectal cancer: future perspectives turning into reality?
No full textThe management of rectal cancer has considerably changed over the last decades and complete response to neoadjuvant chemoradiotherapy is becoming a common clinical entity. There is still no consensus on the definition of complete response to neoadjuvant treatment prior to surgery. Treatment programs are mostly heterogeneous and non-randomized. In addition, techniques to diagnose complete response are still unclear and there is no uniformity in surveillance modality of those patients managed without operative intervention. We review the most recent evidences reported in literature
Permacol Collagen Paste Injection for Treatment of Complex Cryptoglandular Anal Fistulas: An Observational Cohort Study With a 2-Year Follow-up
No full textPermacol paste injection is a novel treatment approach for complex cryptoglandular anal fistulas. This study was performed to evaluate the long-term clinical outcomes of treatment with Permacol paste for complex cryptoglandular fistulas
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
Small bowel intussusception from renal cell carcinoma metastasis: a case report and review of the literature
No full textAbstract
Background: Renal cell carcinoma is the most frequent malignant neoplasia of the kidney accounting for 90 % of all renal solid tumors. Metastases from renal cell carcinoma are rarely located in the small bowel and generally their clinical presentation includes bleeding and obstruction. Intussusception in adults is an extremely rare pathological condition and only 30 to 35 % of small bowel intussusceptions are derived from malignant lesions.
Case presentation: We report here a clinical case of a 75-year-old white man hospitalized for anemia and subocclusion. An abdominal ultrasound and computed tomography showed a small bowel intussusception.
During a surgical exploration, a polypoid lesion was found to be the lead point of the intussusception. His small intestine was resected and a functional side-to-side anastomosis was performed. The histological
features of the surgical specimen confirmed the diagnosis of metastatic renal cell carcinoma.
Conclusions: Small bowel intussusception from renal cell carcinoma metastasis should always be considered in the setting of unexplained intestinal subocclusion in patients with a history of renal cell carcinom
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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