1,720,960 research outputs found
Experience of 463 cases of gastric cancer from a single surgical center
No full textAIM: TO evaluate clinical and histopathological changes of gastric cancer (GC) in the last fifteen years and analyze factors influencing overall survival. MATERIAL OF STUDY: We have retrospectively categorized patients submitted to surgery for GC from January 1996 December 2010. The analysis focused on two periods: 1996-2003 (period 1) and 2004-2010 (period 2). RESULTS: There was an increase in age distribution of GC in period 2 (p=0.012). Significant increase of whole GC was observed in period 2 (p=0.01). Slight but significant changes in TNM stage were found: in group 2 there decrease in the rate of early GC and in advanced depth of tumor invasion; increase of lymph nodes involvement also demonstrated. Overall survival (OS) had not changed from the first to the second period. There was a significant difference in OS calculated for Lauren histotype: from ten months to surgery, patients with diffuse histotype showed prognosis. DISCUSSION: The most important findings were an increase in lymph node involvement and a decrease in depth of tumor invasion, an higher percentage of whole type and a decrease in palliative surgery. Overall-survival hasn't change last fifteen years. These results confirms the importance of extent of lymph node dissection in the standard approach of GC, the tumor stage and Lauren histotypes as the main prognostic factors in GC. CONCLUSION: This work confirms the dismal prognosis of GC and the need to increase diagnosis of early gastric cancer
GIANT MERKEL CELL CARCINOMA OF THE LEFT ARM.CASE REPORT
No full textMerkel cell carcinoma is a rare tumor of dermal origin generally found in sun exposed skin. We report the case of a woman of 76 years old presenting a large vascularized Merkel cell carcinoma (MCC) of the left arm lateral to the elbow joint, infiltrating the muscolo-fascial plane who was treated with surgical therapy and post operative radiotherapy
videolaparoscpy cholecystectomy for acute cholecystitis : analyzing conversion risk factors
No full textWe examined a series of 176 consecutive patients scheduled for videolaparoscopic cholecystectomy for acute cholecystitis to identify the independent parameters most likely to lead to conversion to laparotomy. This prospective study was conducted from June 2001 to December 2003 on 176 consecutive patients who were scheduled for videolaparoscopic cholecystectomy for acute cholecystitis. Of the 176 patients, 119 (group A) underwent videolaparoscopic chlecystectomy, and 57 (32.3%) were converted to laparotomy (group B). Patients were assessed for gender, age, time between onset of symptoms and surgery, previous surgery, ASA (American Society of Anesthesia) risk, leukocytosis, echotomographic findings, average operating time, intra- and post-operative complications, and conversion rate. Our study found that the parameters of age, ASA risk, duration of symptoms, leukocytosis, and operative time are independent conversion risk factors
Bouveret's Syndrome: a case report
No full textDuodenal obstruction due to a gallstone from a cholecystoduodenal fistula (Bouveret's syndrome) is a rare complication of gallstone disease. Patients present gastric outlet occlusion with vomiting, abdominal distension and a state of dehydration. Plain film of the abdomen, ultrasonography and CT scans reveal pneumobilia and the obstructing gallstone. Endoscopy is essential for diagnosis and therapy, with a view to the possibility to relieving the occlusion. Endoscopy, however, cannot be used to treat the fistula and is often unsuccessful because of the very large size of the stone. Surgical therapy can be effective both for relieving the occlusion and for fistula treatment. The authors report a case of Bouveret's syndrome successfully treated surgically in an otherwise healthy patient. In critically ill patients, the primary goal of therapy is relief of the occlusion
Central pontine and extrapontine myelinolysis despite careful correction of hyponatremia: clinical and neuropathological findings of a case
No full textWe report clinical, radiological and pathological findings in a patient with central pontine and extrapontine myelinolysis. The patient was a 61-year-old woman who had a radical mastectomy for breast cancer. Based on clinical evidence, acute hyponatremia had set in only a few days before onset of symptoms. The patient's disease progressed in two stages and became more severe during slow hyponatremia correction after 9 days from onset. Diffusion MRI provided early evidence of neurological lesions. In spite of a therapeutic attempt, the patient died unexpectedly 18 days after onset of her neurological disease due to massive pulmonary embolism. Histologically, our findings confirmed that the major features of central pontine myelinolysis in the acute stage are demyelination, the presence of large amounts of macrophages with no lymphocytic inflammatory reaction, and moderate astrocytosis. It is interesting to note that a monotypic immunological reaction persisted 19 days after radiological demonstration of parenchymal alterations
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
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