91 research outputs found
The integration of ESG information into investment processes: toward an emerging collective belief?
Supporting a Multi-hierarchical Classifcation in the Object-Oriented Paradigm
This research and the resulting prototype system show that the object-oriented paradigm is an appropriate mechanism for supporting a complex, multi-hierarchical controlled vocabulary and the resulting classification when applied to a data base. In addition to supporting such a classification, it allows the searching and browsing of both the data base items and the assigned vocabulary terms
Cerebellar liponeurocytoma with extracranial extension: Case report
Cerebellar liponeurocytoma is a newly recognized, rare clinicopathological entity commonly described in the cerebellar hemispheres or the vermis.
We present a rare case of cerebellar liponeurocytoma arising from the left cerebellar amygdala with extracranial extension. Such a condition has never been previously reported
Subependymome du ventricule lateral: presentation dâune serie de 5 cas et revue de la litterature.
Description Les subĂ©pendymomes sont des tumeurs bĂ©nignes rares, de dĂ©couverte souvent fortuite et siĂ©geant prĂ©fĂ©rentiellement au niveau du quatriĂšme ventricule, plus rarement au niveau du ventricule latĂ©ral.Objectif Le but de notre Ă©tude est de prĂ©senter notre expĂ©rience en matiĂšre de subĂ©pendymomes du ventricule latĂ©ral et de discuter leurs caractĂ©ristiques cliniques, radiologiques, de prise en charge et pronostiques au vu des donnĂ©es actuelles de la littĂ©rature.MĂ©thode Etude rĂ©trospective de cinq cas de subĂ©pendymomes symptomatiques du ventricule latĂ©ral pris en charge au sein de notre institution au cours des dix derniĂšres annĂ©es.RĂ©sultats Cinq sujets de sexe masculin avec des subĂ©pendymomes histologiquement prouvĂ©s ont Ă©tĂ© recensĂ©s. LâĂąge moyen Ă©tait de 35.2 ans. La prĂ©sentation clinique allait du dĂ©but brutal avec aggravation rapide de lâĂ©tat neurologique aux formes insidieuses avec syndrome dâhypertension intracrĂąnienne Ă©voluant depuis un an. La tumeur Ă©tait confinĂ©e au ventricule latĂ©ral dans trois cas et Ă©tendue au troisiĂšme ventricule dans les deux autres cas avec une taille allant de 12 Ă 42 mm. LâexĂ©rĂšse complĂšte par un abord trans calleux Ă©tait rĂ©alisĂ©e dans tous les cas. LâĂ©volution Ă©tait favorable avec absence de rĂ©cidive aprĂšs un suivi moyen de 6 ans 2 mois.Conclusion Les subĂ©pendymomes du ventricule latĂ©ral sont rares, avec une symptomatologie variable et une Ă©volution imprĂ©visible. La chirurgie est la modalitĂ© thĂ©rapeutique de choix et lâexĂ©rĂšse totale doit ĂȘtre envisagĂ©e dans tous les cas.Mots clĂ©s : Chirurgie, Imagerie par rĂ©sonance magnĂ©tique, SubĂ©pendymome, Ventricule latĂ©ral, SubĂ©pendymome, Ventricule latĂ©ra
Abces amibien cerebral: a propos de trois cas avec revue de la litterature
Introduction LâabcĂšs amibien cĂ©rĂ©bral est une infection rare mais mortelle. Depuis son identification en 1965, peu de cas ont Ă©tĂ© observĂ©s dans le monde entier.MatĂ©riel et mĂ©thode Les objectifs de cette Ă©tude Ă©taient de caractĂ©riser les aspects cliniques, radiologiques, histologique, pronostic ainsi que thĂ©rapeutique de cette pathologie avec une revue de la littĂ©rature. Nous rapportons trois cas dâabcĂšs amibien cĂ©rĂ©bral qui ont Ă©tĂ© admis dans notre service entre 2010 et 2013.RĂ©sultats Il sâagit de deux hommes et une femme, ĂągĂ©s respectivement de 33, 43 et 56 ans qui ont Ă©tĂ© opĂ©rĂ©s. Le diagnostic a Ă©tĂ© confirmĂ© par les examens histologique et sĂ©rologique. Nous nâavons observĂ© aucune mortalitĂ©.Conclusion Il sâagit dâune atteinte sporadique mais reprĂ©sente un problĂšme de santĂ© publique et dont le pronostic est habituellement sombre.Mots clĂ©s : amibiase; abcĂšs cĂ©rĂ©bral; IRM ; TDM; examen histologiqu
Spindle cell oncocytoma of the adenohypophysis in a woman: a case report and review of the literature
<p>Abstract</p> <p>Introduction</p> <p>Spindle cell oncocytoma of the adenohypophysis is a rare tumour recently reported by Roncaroli <it>et al. </it>in 2002. This tumour is considered a grade I tumour by the World Health Organization.</p> <p>Case presentation</p> <p>We describe what is, to the best of our knowledge, the 14th case of its kind in the literature. A 45-year-old African woman presented clinical and radiological findings related to a nonfunctioning pituitary adenoma. The diagnosis was made on the basis of histological and immunohistochemical findings.</p> <p>Conclusion</p> <p>The purpose of this work is to report a rare pituitary tumour and to describe its histological and immunohistochemical features, which were characterized by the expression of thyroid transcription factor 1 antigen by tumour cells. This fact could support the theory of a possible common origin of these tumours in pituicytomas. In fact, thyroid transcription factor 1 is considered to be a specific marker of pituicytes.</p
Spatial contrast sensitivity in adolescents with autism spectrum disorders
Adolescents with autism spectrum disorders (ASD) and typically developing (TD) controls underwent a rigorous psychophysical assessment that measured contrast sensitivity to seven spatial frequencies (0.5-20 cycles/degree). A contrast sensitivity function (CSF) was then fitted for each participant, from which four measures were obtained: visual acuity, peak spatial frequency, peak contrast sensitivity, and contrast sensitivity at a low spatial frequency. There were no group differences on any of the four CSF measures, indicating no differential spatial frequency processing in ASD. Although it has been suggested that detail-oriented visual perception in individuals with ASD may be a result of differential sensitivities to low versus high spatial frequencies, the current study finds no evidence to support this hypothesis
Atypical disengagement from faces and its modulation by the control of eye fixation in children with Autism Spectrum Disorder
By using the gap overlap task, we investigated disengagement from faces and objects in children (9â17 years old) with and without autism spectrum disorder (ASD) and its neurophysiological correlates. In typically developing (TD) children, faces elicited larger gap effect, an index of attentional engagement, and larger saccade-related event-related potentials (ERPs), compared to objects. In children with ASD, by contrast, neither gap effect nor ERPs differ between faces and objects. Follow-up experiments demonstrated that instructed fixation on the eyes induces larger gap effect for faces in children with ASD, whereas instructed fixation on the mouth can disrupt larger gap effect in TD children. These results suggest a critical role of eye fixation on attentional engagement to faces in both groups
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