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  • Key Words: Spontaneous dissecting aneurysm  (1)
  • lymphocyte differentiation antigens  (1)
  • 1
    ISSN: 1615-6706
    Keywords: Key Words: Spontaneous dissecting aneurysm ; Internal carotid artery ; Cranial nerves ; Schlüsselwörter: Spontane Dissektion ; Arteria carotis interna ; Parese der Hirnnerven
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung: Ende der 70er Jahre wurde die spontane Dissektion der Arteria carotis interna besonders durch die verbesserte angiographische Technik und ihre infolgedessen verbreiterte Indikation häufiger diagnostiziert und als mögliche Ursache zerebraler ischämischer Insulte erkannt. Mehr Zeit brauchte die Erkenntnis, daß die spontane Dissektion der Arteria carotis interna auch für die periphere Parese der Hirnnerven, besonders der unteren vier, aber auch nicht so selten der oberen, verantwortlich ist. Die Lähmungen können auch isoliert auftreten ohne zerebrale Ischämie, so daß in solchen Fällen der Gedanke einer spontanen Dissektion der Arteria carotis interna als mögliche Ursache in der Differentialdiagnose sehr wichtig ist. Wenn heute dieses Syndrom diagnostiziert wird, ist die Pathogenese der Lähmungen der Hirnnerven noch nicht völlig klar, wenn auch wahrscheinlich ihre direkte Kompression oder aber eine Ischämie durch Beeinträchtigung der versorgenden Gefäße eine Rolle spielt.
    Notes: Abstract: In the late 1970s the technical improvement and the widespread use of angiography allowed increasing confidence with radiological and clinical features of spontaneous dissection of the internal carotid artery. If the association with stroke was early clear not as much rapid was the recognition that spontaneous dissection could cause cranial nerve palsy. Lower and more rarely upper cranial nerves can be involved frequently without cerebral ischemia. The etiopathogenesis of this syndrome is not completely clear. It is assumed that mechanical compression and/or ischemia of the nerves due to impairment of supplying arteries are responsible for the syndrome.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1590-3478
    Keywords: Myasthenia Gravis ; thymus ; lymphocyte differentiation antigens
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Sommario Nel timo i timociti esprimono diversi antigeni di superficie in accordo con il loro stadio di maturazione. In questo lavoro, sono stati studiati gli antigeni di differenziazione timica nel timo di 20 pazienti con miastenia gravis (MG) e di 10 soggetti sottoposti a intervento cardiochirurgo. Per evidenziare gli antigeni di superficie delle cellule timiche sono stati utilizzati anticorpi monoclonati coniugati con isotiocianato di fluorescina. Rispetto al timo normale, nel timo miastenico si è rilevata una riduzione della percentuale di espressione degli antigeni CD1, CD5 e CD7, un significativo aumento dei linfociti CD20+ e nessuna differenza significativa nell'espressione degli antigeni, CD3, CD4 e CD8. Questi risultati suggeriscono da una parte la riduzione degli immunofenotipi corrispondenti a timociti corticali (che probabilmente riflettono l'atrofia della corticale timica già dimostrata nella MG), dall'altra suggeriscono l'incremento di cellule B mature (CD20+) in grado di intervenire in una attiva risposta immunitaria.
    Notes: Abstract Thymocytes express multiple different surface antigens according to their stage of maturation. We studied lymphocyte surface differentiation antigens using direct immunofluorescence technique in the thymus of 20 patients with myasthenia gravis (MG) and 10 controls undergoing cardiac surgery. Fluorescein isothiocyanateconjugated monoclonal antibodies were used to stain thymic cell surface antigens. We found a decrease in the percent expression of CD1, CD5, and CD7 surface antigens and a significant increase of CD20+ cells in myasthenic thymus compared with the controls. The changes in the percent expression of CD3, CD4, and CD8 antigens were not significant. These data suggest both the decrease in the imunophenotypes corresponding to cortical thymocytes (probably reflecting the cortical atrophy of the MG thymus) and the increase of mature B Cells (CD20+), which may participate in an active immune response.
    Type of Medium: Electronic Resource
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