1,720,958 research outputs found
Inflammatory pseudotumour of the liver: case report and review of the literature
No full textViene riportato il caso di una donna di 53 anni che, da circa un mese, lamentava malessere, febbricola e dolore gravativo in ipocondrio destro con modesta dolenzia alla palpazione profonda dell'addome in ipocondrio destro. L'ecotomografia addomi naie evidenziava una lesione focale di 5 cm situata tra il VI e il VII segmento epatico, con limitanti piuttosto regolari ma sfumate e ottima trasmissione del segnale acustico. La TC dimostrava caratteristiche compatibili sia con un processo infiammatorio sia con una lesione tumorale. Ciò ha reso necessario il prelievo istologico ecoguidato; l'esame istologico ha evidenziato la presenza di tessuto di granulazione, infiltrati flogistici di tipo cronico, componenti tissutali necrotici in un quadro compatibile con un processo infiammatorio anche se, per l'esiguità del materiale, non si poteva escludere la presenza di un concomitante processo neoplastico. Dopo 2 settimane di terapia antibiotica senza miglioramento, la paziente è stata sottoposta a intervento chirurgico di resezione del VI e VII segmento epatico e colecistectomia. La diagnosi istologica definitiva corrispondeva a uno "pseudotumore infiammatorio del fegato di verosimile eziologia actinomicotica". Dopo 2 settimane la paziente è stata dimessa e, a distanza di 5 anni dall'intervento, gode di buona salute. Per pseudotumore infiammatorio epatico si intende una lesione benigna molto rara che si caratterizza per un decorso clinico e imaging radiologico molto simile a quello di una neoplasia maligna, primitiva o secondaria. Nonostante la chiara natura infiammatoria della massa, l'agente eziopatogenetico non è quasi mai identificabile o isolabile. Nella patogenesi invece viene presa in considerazione una possibile risposta immunitaria aspecifica a stimoli vari. L'esame istologico evidenzia tipici aspetti infiammatori con presenza di una grande varietà di cellule, in cui prevalgono le plasmacellule, in uno stroma più o meno ricco di connettivo. La diagnosi si fonda quasi esclusivamente sull'esame istologico, di biopsia ECO!TC guidata o del pezzo operatorio. La terapia risulta ancora oggetto di discussione: vengono infatti descritti casi a risoluzione spontanea e/o dopo terapia medica antibiotica o steroidea; l'approccio chirurgico resettivo tuttavia è quello più utilizzato e ciò in considerazione della difficoltà di una diagnosi di certezza e delle possibili complicanze legate all'evoluzione delle lesioni
Emergencies in colorectal carcinoma: negative prognostic factor
No full textThe authors analyze a consecutive series of 219 patients affected by complicated colorectal cancer who underwent surgery in emergency. In hospital mortality, 5-year survival and recurrence’s incidence in 104 of these patients who underwent curative treatment are calculated and compared with a series of 701 patients who underwent elective surgical treatment. There was no significative statistical difference between emergency and elective group. At the multivariate analysis only the stage of the tumour was an independent prognostic factor
Functional complications of the lower urinary tract after curative exeresis for cancer of the rectum
No full text
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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