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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Acta neuropathologica 79 (1989), S. 340-346 
    ISSN: 1432-0533
    Keywords: Paraganglioma ; Melanin ; Orbit ; Immunocytochemistry ; Electron microscopy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary A paraganglioma of the orbit in a 21-year-old woman is presented, containing oculo-cutaneous melanin in many tumor cells, occasionally adjacent to neurosecretory granules, and in macrophages. This tumor expands the list of neuroectodermal tumors with potential melaninization.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    European archives of psychiatry and clinical neuroscience 225 (1978), S. 275-282 
    ISSN: 1433-8491
    Keywords: Metachromatic leucodystrophy, adult ; Sulfatidosis ; Intracellular storage ; Lamellar inclusions ; Electron microscopy ; Metachromatische Leukodystrophie, adulte ; Sulfatidose ; Intracelluläre Speicherung ; Lamelläre Einschlüsse ; Elektronenmikroskopie
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Primär formalinfixierte Gewebsproben aus der entmarkten weißen Substanz des Stirnhirns eines Autopsiefalles von adulter MLD wurden elektronenmikroskopisch untersucht. Das intracelluläre Speichermaterial ließ folgende Strukturmuster-Typen erkennen: (I) Gewöhnliche Myelinfiguren; (II) gefältelte Myelinfiguren; (III) schmale Stapel von scheibchenförmigen Lamellen, die sehr wahrscheinlich Bestandteile von ehemals kompakten „prismatischen“ Einschlüssen waren; (IV) gepaarte Lamellen, entweder in lockerer paralleler Anordnung oder in regelloser Verteilung und Ausrichtung; (V) Schichten von parallel verlaufenden Lamellen mit alternierend dichten und kontrastarmen Zwischenräumen; und (VI) Häufchen von Gebilden, die Bruchstücken von sog. pentalaminären Membranen glichen. Die Typen I bis IV sind sowohl bei Früh-als auch bei Spätformen der MLD schon beschrieben worden, die Typen V und VI dagegen noch nicht. Möglicherweise hatten postmortal-autolytische Vorgänge eine Änderung der strukturellen Organisation von einigen cytoplasmatischen Ablagerungen und die Ausbildung dieser bisher bei der MLD unbekannten Lamellenmuster bewirkt.
    Notes: Summary Formalin-fixed samples from the demyelinated frontal white matter of an autopsy case of adult-onset MLD were studied by electron microscopy. The intracellular storage materials exhibited the following types of structural patterns: (I) ordinary myelin figures; (II) pleated myelin figures; (III) narrow stacks of lamellar discs which were most likely components of formerly compact ‘prismatic’ inclusions; (IV) paired lamellae, either arranged in loose parallel arrays or scattered about in random directions; (V) piles of parallel lamellae with alternating electron-dense and electron-lucent interspaces; and (VI) collections of structures resembling fragments of so-called pentalaminar membranes. Types I to IV have already been described in early-onset as well as in late-onset forms of MLD, but types V and VI have not. Postmortem autolysis had possibly altered the structural organization of some cytoplasmic deposits and given rise to the formation of those lamellar patterns which were hitherto not known to occur in MLD.
    Type of Medium: Electronic Resource
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