1,720,968 research outputs found
Odontogenic-Like Pain in Partial Edentulism: An Unusual Presentation of Diffuse Large B-Cell Lymphoma of the Mandible
No full textPrimary bone lymphoma is a rare entity and it usually occurs in long bones. Primary mandibular involvement is very rare, and it usually shows unspecific features, mimicking odontogenic inflammatory lesions. We present the unusual case of a diffuse large B-cell lymphoma (DLBCL) of the right mandibular body in a 91-year-old woman, who presented with acute pain in the mandibular region initially suspicious for odontogenic abscess. No significant findings were seen on orthopantomography (OPG) and her almost complete edentulism made the diagnosis of abscess unlikely. Computed tomography and magnetic resonance images showed an expansive mass around the right mandibular body with erosion of cortical bone and involving the right mandibular canal and nerve. Final diagnosis of DLBCL was pathologically proven. The presence of odontogenic-like pain in nearly complete edentulism should be suspicious for malignancy, and it needs further diagnostic workup despite the absence of signs on OPG
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
Endonasal approaches to the sellar and parasellar regions: closure techniques using biomaterials
No full textPURPOSE: We reviewed the clinical outcomes resulting from various closure
techniques used following endoscopic endonasal surgery for lesions in the sellar
and parasellar regions. We compared our current closure technique, which uses a
biological matrix of native equine collagen (TissuDura) fixed with fibrin sealant
(Tisseel), with the technique we employed previously, using autologous materials,
in order to assess the comparative efficacy and tolerability of both methods over
the medium- to long-term.
METHODS: A review was conducted of all cases of endonasal endoscopic intervention
carried out in our institution between 1997 and 2007. Operations performed
between January 1st 1997 and December 31st 2003 involved a sellar closure
technique using autologous materials, either alone or supported by fibrin
sealant. From January 1st 2004, sellar reconstruction techniques involving
resorbable heterologous materials were used in the closure phases.
Post-operatively, clinico-endoscopic assessments took place at 15 days, 1, 3, and
6 months and yearly thereafter, supplemented by magnetic resonance imaging (MRI)
scanning at 3 months and annually.
RESULTS: Between January 1st 1997 and December 31st 2003, 79 operations were
performed in which the sellar closure technique involved the use of autologous
materials. Between January 1st 2004 and January 1st 2008, 125 operations were
performed in which biomaterials were used for sellar closure. The incidence of
complications (fluid fistula) was 2.5% in the autologous materials closure group
and 1.6% in the biomaterials closure group. The most marked difference between
the two approaches was seen at 1-month follow-up, when restoration of mucociliary
transport in the sphenoidal sinus and physiological functionality of the nasal
mucosa and paranasal sinuses were observed to be superior in the biomaterials
patient cohort.
CONCLUSIONS: The development of biomaterials for closure of the sellar floor
offers a viable alternative to traditional techniques using autologous materials
Endonasal approaches to the sellar and parasellar regions: Closure techniques using biomaterials
No full textPurpose: We reviewed the clinical outcomes resulting from various closure techniques used following endoscopic endonasal surgery for lesions in the sellar and parasellar regions. We compared our current closure technique, which uses a biological matrix of native equine collagen (TissuDura) fixed with fibrin sealant (Tisseel), with the technique we employed previously, using autologous materials, in order to assess the comparative efficacy and tolerability of both methods over the medium- to long-term. Methods: A review was conducted of all cases of endonasal endoscopic intervention carried out in our institution between 1997 and 2007. Operations performed between January 1st 1997 and December 31st 2003 involved a sellar closure technique using autologous materials, either alone or supported by fibrin sealant. From January 1st 2004, sellar reconstruction techniques involving resorbable heterologous materials were used in the closure phases. Post-operatively, clinico-endoscopic assessments took place at 15 days, 1, 3, and 6 months and yearly thereafter, supplemented by magnetic resonance imaging (MRI) scanning at 3 months and annually. Results: Between January 1st 1997 and December 31st 2003, 79 operations were performed in which the sellar closure technique involved the use of autologous materials. Between January 1st 2004 and January 1st 2008, 125 operations were performed in which biomaterials were used for sellar closure. The incidence of complications (fluid fistula) was 2.5% in the autologous materials closure group and 1.6% in the biomaterials closure group. The most marked difference between the two approaches was seen at 1-month follow-up, when restoration of mucociliary transport in the sphenoidal sinus and physiological functionality of the nasal mucosa and paranasal sinuses were observed to be superior in the biomaterials patient cohort. Conclusions: The development of biomaterials for closure of the sellar floor offers a viable alternative to traditional techniques using autologous materials. © 2009 Springer-Verlag
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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