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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Acta neuropathologica 10 (1968), S. 17-25 
    ISSN: 1432-0533
    Keywords: Myelinated CNS axons ; Axoplasm ; Tubular structures ; Axonal reactive changes ; Electron microscopy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Eine honigwabenartige tubuläre Anordnung wurde in stark myelinisierten Axonen gefunden. Sie wurde im Kleinhirn einer offenbar gesunden Ratte und eines Schimpansen mit Kuru-ähnlichen Symptomen beobachtet. Sie fand sich ferner in der Großhirnrnde einer Maus mit einem intracerebralen Tumorimplantat. Eine verbindliche Ursache konnte nicht aufgedeckt werden. Es wird jedoch angenommen, daß diese Struktur eine spezifische axonale Reaktion auf eine mögliche Vielfalt von noch unbekannten Bedingungen entspricht.
    Notes: Summary A honeycomb-like tubular array was observed in heavily myelinated axons. It was observed in the cerebellum of an apparently normal rat and a chimpanzee with “Kurulike” symptoms. It was also found in the cerebral cortex of a mouse that had had a intracerebral tumor implant. A common underlying etiology could not be found. It is suggested, however, that this structure represents a specific axonal response to perhaps a variety of as yet unknown conditions.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Acta neuropathologica 10 (1968), S. 308-323 
    ISSN: 1432-0533
    Keywords: Experimental brain tumors ; Virus with brain tumors ; Electron microscopy ; Histochemistry ; Hydrocarbon (crystalls), oncogenic
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Krebserzeugende Kohlenwasserstoffe wurden in Gehirn und Muskel von C3H Mäusen implantiert. Dabei konnten virusähnliche, cylindrisch geformte Partikel in den präcarcinomatösen Läsionen nachgewiesen werden. Die filamentartigen Stäbchen wurden nur im Cytoplasma von solchen Zellen beobachtet, die phagocytiertes Carcinogen enthielten. Die meisten Zellen, in denen diese Viruspartikel nachzuweisen waren, wurden als Makrophagen angesehen und es wird angenommen, daß sie mesenchymaler Herkunft sind. Der genaue Mechanismus, durch den die krebserzeugende Wirkung der Kohlenwasserstoffe zur Bildung von Viruspartikel führt, ist nicht klar, aber offensichtlich ist das endoplasmatische Reticulum beteiligt. Viele Partikel konnten innerhalb der Cisternen beobachtet werden; dabei wurde ihre äußere Hülle von der Membran des endoplasmatischen Reticulums gebildet. Gelegentlich wurden die Viruspartikel auch zwischen den zwei Membranen der Kernhülle beobachtet. Die Bedeutung dieser Partikel in Beziehung zu den Tumoren ist unbestimmt. Die Möglichkeit besteht, daß sie eine unreife oder unvollendete Form darstellen und daß zusätzliche Faktoren erforderlich sind, um ihre krebserzeugende Wirkung hervorzubringen.
    Notes: Summary Carcinogenic hydrocarbons were implanted into brain and muscle of C3H mice. Virus-like particles of cylindrical form were demonstrated in the precancerous lesions. These filamentous rods were observed only within the cytoplasm of those cells which contained phagocytosed carcinogen. The majority of reactive cells containing the virus-like particles were identified as macrophages, and are thought to be mesenchymal in origin. The precise mechanism by which the carcinogenic effect results in the formation of virus-like particles is not clear, but evidently involves the endoplasmic reticulum. Many of the particles were found within the cisternae, and their outer shells were derived from the membranous component of the endoplasmic reticulum. Occasionally, they were seen between the two membranes of the nuclear envelope. The significance of these particles in relationship to tumors is not certain. The possibility exists that they represent immature or incomplete forms and that additional factors may be necessary to prove them oncogenic.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Acta neuropathologica 14 (1969), S. 14-18 
    ISSN: 1432-0533
    Keywords: Peroxidase Transport ; Fetal Choroid Plexus ; Tracer Protein ; Vascular Compartment
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Résumé Des observations sont presenté sur l'absorption et le transport du protein «horse radish» peroxidase par le plexus choroidien du rat pendant sa maturation. Dans tout les animaux injectés les produits de réaction de peroxidase étaient identifiés dans les membranes basales et latérales et les espaces intercéllulaires. Aucun trace de peroxidase n'était demonstré à l'interieure des cellules epithéliales du plexus avant l'age de 4–5 jours.
    Notes: Summary The uptake and transport of the tracer protein horse-radish peroxidase was studied in the developing choroid plexus of the rat. In all age groups the tracer was identified in the vascular compartment and in intercellular spaces but none was present within choroidal epithelial cells prior to the 4th to 5th day post partum.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Acta neuropathologica 26 (1973), S. 265-272 
    ISSN: 1432-0533
    Keywords: Alzheimer Neurofibrillary Tangles ; Electron Microscope ; Eosinophilic Rod-like Structures ; Phosphotungstic Acid
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The ethanolic phosphotungstic acid technique of Bloom and Aghajanian has been applied to formalin-fixed neuropathological specimens. The staining reactions of various normal organelles were studied as well as a number of pathological alterations including Alzheimer neurofibrillary tangles, eosinophilic rod-like structures, corpora amylacea, lamellar bodies and honeycomb-like structures in the axoplasm.
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1432-0533
    Keywords: Malignant Lymphoma ; Blood Vessels ; Lymphe Node ; Ultrastructure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The fine structure of the blood vessels of an apparently primary intracerebral malignant lymphoma was compared with those in another malignant lymphoma in a retroperitoneal lymph node. The essential features of the blood vessels in both cases were the same. They resembled the blood vessels found in normal lymph nodes and were both distinctly different from those seen in normal brain. It was concluded that the direction of differentiation of the blood vessels which arise to nourish the neoplastic tissue is determined by the nature of the tumor rather than the vessels from which they originate.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Acta neuropathologica 8 (1967), S. 69-75 
    ISSN: 1432-0533
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Die Implantation von Pellets chemischer Cancerogene in das Kleinhirn erwachsener Mäuse von Inzuchtstämmen (C3H und C5 7Bl) erzeugen nach 150 Tagen eine Zellreaktion, in der sich Phagocytose des Carcinogens nachweisen läßt. Die phagocytierten Carcinogenpartikel reagieren mit dem endoplasmatischen Reticulum der reaktiven Zellen und bilden virusartige Partikel von bestimmter Größe und morphologischer Erscheinungsform. Die Partikel nehmen an Zahl zu und verschwinden im Zeitpunkt der Tumorzellausbreitung. Die Tumorzellen scheinen von den Neuronen der Körnerzellschicht der Kleinhirnrinde und mitunter zusätzlich von Astrocyten auszugehen. In seltenen Fällen enthält das sogenannte Medulloblastom zusätzlich Zellen sarkomatöser Natur.
    Notes: Summary Pellets of chemical carcinogens when implanted into the cerebella of adult mice of inbred strains (C3H and C5 7 Bl) produce after 150 days a cellular reactive response in which there is evidence of phagocytosis of the carcinogen. The phagocytized crystalline particles of carcinogen interact with the endoplasmic reticulum of the reactive cells to produce virus like particles of a distinctive size and morphologic appearance. These particles increase in number with time and disappear just as tumor cells emerge. The tumor cells appear to be derived from the neurons of the granular cell layer of the cortex and sometimes, in addition, from astrocytes. In rare instances the so-called medulloblastoma contains, in addition, cells of a sarcomatous nature.
    Type of Medium: Electronic Resource
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  • 7
    ISSN: 1432-0533
    Keywords: Tuberous Sclerosis ; Giant Neurons ; Neurofibrillary Tangles ; Granulovacuolar Degeneration ; Argentophilic Globules ; Aging Changes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Bei einem 13jährigen Mädchen mit tuberöser Hirnsklerose wurde ein Rindenherd im Parietallappen beobachtet. Zahlreiche Riesenneurone in der betroffenen Region enthielten Alzheimersche Fibrillenveränderungen, granulovacuoläre Degeneration und argyrophile Kugeln. Über diese Befunde liegen im Schrifttum bisher keine Beobachtungen vor.
    Notes: Summary A lesion of tuberous sclerosis was observed in the parietal cortex of a 13-year old girl. Numerous giant neurons in the affected areas contained Alzheimer's neurofibrillary tangles, granulovacuolar degeneration and argentophilic globules. These findings in tuberous sclerosis, insofar as we know, are new in the literature.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Acta neuropathologica 18 (1971), S. 214-223 
    ISSN: 1432-0533
    Keywords: Epithelial Cyst ; Spinal Cord ; Cilia ; Ependyma ; Enterogenous Cyst
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The fine structure of an intradural and extramedullary cyst compressing the spinal cord was examined. The cyst was lined by a single epithelial layer of both ciliated and non-ciliated cells. The non-ciliated cells differ from the former by the presence of secretory granules and a surface coating as well as other characteristics. The epithelial layer was bordered by a basement membrane and prominent interdigitation was found along the lateral borders. The origin of these cells is unknown but the similarity between them and the epithelium of the respiratory tract is noted.
    Type of Medium: Electronic Resource
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  • 9
    ISSN: 1432-0533
    Keywords: Steele-Richardson-Olszewski Syndrome ; Progressive Supranuclear Palsy ; Neurofibrillary Tangles ; Electron Microscopy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The neurofibrillary tangles found in the neurons of a case of Steele-Richardson-Olszewski syndrome were studied by electron microscopy. Both the flame-shaped and globose type of tangles were present. The neurofibrillary tangles were composed of bundles of straight tubules measuring approximately 150 Å in diameter. This ultrastructural appearance of the tangles in Steele-Richardson-Olszewski syndrome is different from the appearance of tangles found in other neurological disorders and is probably indicative of intraneuronal accumulation of a new type of fibrous protein.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Acta neuropathologica 42 (1978), S. 11-13 
    ISSN: 1432-0533
    Keywords: Cerebellum ; Medulloblastoma ; Neuroblastoma ; Synapses ; Synaptic vesicles
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary A cerebellar neoplasm of an 18-month-old boy was examined with both the light and electron microscopes. The diagnosis of neuroblastoma was made on the basis of the presence of numerous synaptic vesicles in the great majority of cell processes and the occasional complete synapses within the tumor tissue.
    Type of Medium: Electronic Resource
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