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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Acta neuropathologica 76 (1988), S. 87-93 
    ISSN: 1432-0533
    Keywords: Alzheimer's disease ; Neuritic plaques ; Fascia dentata ; Hippocampal formation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Neuritic plaques are prominent in the fascia dentata of the hippocampus and are often linearly oriented in stratum moleculare. Since the afferents to this region are also organized in a laminar pattern, the present study focused on the relative number and laminar distribution of plaques in this region to shed light on the genesis of the neuritic plaques. Examination of 19 brains from patients with Alzheimer's disease showed approximately the same number of plaques in the stratum moleculare of the fascia dentata and in CA1 (Sommer's sector) of the hippocampus, even though the area of the latter is much greater. Laminar analysis of plaque location showed that the plaques were centered on a band between 26% and 40% of the way between the border of stratum granulosum and the outer edge of stratum moleculare. The mean location was 35% of the way through the layer at the intersection of the inner and middle thirds. Plaques appear in approximately the same location, but in lesser numbers, in non-demented patients. The significance of this localization is discussed in terms of the normal anatomy of the fascia dentata and its possible reorganization in Alzheimer's disease. The predictability of plaque formation in this region could be useful in defining the pathogenesis of the neuritic plaque.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-0533
    Keywords: Acquired immune deficiency syndrome (AIDS) ; Leukoencephalopathy ; Cytomegalovirus ; Papovavirus ; HTLV-III/LAV
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Two adult patients with acquired immune deficiency syndrome (AIDS) presented with psychoorganic symptoms produced by an extensive cerebral and cerebellar leukoencephalopathy. Diffuse loss of myelin and axons with reactive astrocytosis and distinctive multinucleated giant cells were prominent in the deep white matter, but less so in the subcortical white matter and in compact myelinated pathways. Bilateral involvement of the centrum semiovale produced distal Wallerian degeneration of the descending pyramidal tracts, which in one patient correlated with progressive paraparesis and bladder dysfunction. Although there were morphological indications of cytomegalovirus infection and immunohistochemical evidence of papovavirus antigens, the neuropathology did not resemble that usually associated with infection by these opportunistic agents. The possibility is entertained that the progressive diffuse leukoencephalopathy (PDL) in these patients was directly related to infection with human T-cell lymphotropic virus (HTLV-III/LAV), the etiologic agent of AIDS.
    Type of Medium: Electronic Resource
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