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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Acta neuropathologica 16 (1970), S. 271-284 
    ISSN: 1432-0533
    Keywords: Medulloblastoma ; Electron Microscopy ; Arachnoid Sarcoma ; Lymphocyte-Like Cells ; Dark Cells ; Histogenesis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung 9 Medulloblastome wurden elektronenmikroskopisch untersucht. Sie zeigten eine relativ einheitliche histologische und cytologische Struktur. Die Tumorzellen haben eine wechselnde Form, wenig Organellen und in der Regel zahlreiche cytoplasmatische Fortsätze. In Gewebspartikeln, die nach der vorherigen lichtmikroskopischen Untersuchung aus dem Tumorzentrum stammten, wurden keine Zellen mit glialer oder neuronaler Differenzierung beobachtet. Nur in den am Tumorrand gelegenen Infiltrationszonen, wo die Tumorgrenze nicht mehr sicher zu bestimmen war, fanden sich gliale oder neuronale Zellelemente. — Das Medulloblastom hat die wesentlichen morphologischen Kriterien der kleinzelligen Sarkome und des embryonalen Gewebes. Deren gemeinsames Charakteristicum, daß sie nämlich keine speziellen Differenzierungen besitzen, ist auch eine spezifische Eigenschaft des Medulloblastoms.
    Notes: Summary 9 medulloblastomas were investigated by electron microscopy. They all showed a rather unique histological and cytological structure. The cells were differently shaped, had in general many cytoplasmic processes and only few organells. Special differentiations which would have made tumour elements look like glial or neural cells were not observed when the tissue samples under investigation were carefully selected by light microscopical examination. Glial or neural elements were found only in infiltration zones where no clear distinction between pre-existing cerebellar and tumourous tissues could be made by conventional histological investigation. Medulloblastomas have essentially the same appearance as parvicellular sarcomas or embryonic tissues. Their common characteristic, viz. that they usually show no special differentiation, is also the most specific quality of medulloblastomas.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-0533
    Keywords: Tissue Culture ; Electron Microscopy ; Enzyme Histochemistry ; Sympathetic Ganglioneuroblastoma ; Medulloblastoma
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The results of combined tissue culture, ultrastructural and enzyme histochemical investigations carried out on a sympathetic ganglioneuroblastoma are reported.In vitro a vigorous sprouting of newly formed neuritic processes was observed a few days after explantation. The enzymatic reactions for acethylcholinesterase were positivein situ as well asin vitro. The tumor elements showed the ultrastructural characteristics of nerve cells with many microtubuli and filaments, plenty of ribosomes, well developed endoplasmic reticulum. Dense bodies, corresponding to neurosecretion granula (catecholamines) were also observed. Synaptic structures were missing. The results of these investigations confirm that this kind of tumor is different from so-called medulloblastoma.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1432-0533
    Keywords: Craniopharyngioma ; Tissue Culture ; Electron Microscopy ; Enzyme Histochemistry ; Keratine ; Enamel ; Rosenthal Fibers
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Electron optical and enzyme histochemical investigations carried out on four craniopharyngiomas and their tissue cultures demonstrated that the tumour elements are keratinizing epithelial cells, plenty of tonofilaments, glycogen granules, mitochondria and desmosomes. Their ultrastructural and histochemical characteristics are the same in every part of the tumour (solid; cystic; “adamantinoma-like”). In the keratinizing cells, the reactions for non-specific esterases were high positive. The ultrastructural characteristics of the tumour cells grownin vitro are the same as thosein situ; the cells remain attached to one another by desmosomes and retain their capacity to produce keratine. This therefore seems to be a primary characteristic of the tumour cells and not a secondary dysmetabolic disturbance. Calcium was found onlyin situ. That the tumour cells may produce enamelin situ seems to be possible, but it could not be confirmed with certainty. The glial proliferation which is always presentin situ, is reactive and not neoplastic; thein vitro new built cell colonies consist only of epithelial elements.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1432-0533
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Electron microscopic and enzyme histochemical investigations were carried out on a group of spongioblastomas and astrocytomas and their tissue cultures. Both neoplastic cell populations are ultrastructurally identical, but show differences in the late stages of cultivation,viz. in the modality of degeneration. The cytoplasm of “spongioblasts” becomes progressively overloaded with filaments, floccular material and fine granular osmiophilic masses, which leads to cell necrosis. These osmiophilic masses correspond to Rosenthal fibers of light microscopy. In some cells, before Rosenthal fibers appear, the granular ground substance is thickened, particularly close to the Golgi apparatus and the ribosomes are increased in number. At times, some mitochondria show an abnormal dense homogeneous matrix. This peculiar cell degeneration seems to be not the consequence of a simple overproduction of filaments, but a manifold cellular disorder akin to a storage dystrophy.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Acta neurochirurgica 22 (1970), S. 59-65 
    ISSN: 0942-0940
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary In a man with operated frontal lobe protoplasmic astrocytoma and dying two years later under the clinical picture of recurrence, an undifferentiated microcellular tumour, obviously of leptomeningeal origin, was found within the old operation hole. The surrounding brain tissue showed a distinct proliferation of neoplastic astrocytes which exactly corresponded to the former operated glioma. Transitional forms between the two neoplastic cell types could not be identified. The case is interpreted as a rare collision tumour and the analogies between this parvicellular sarcoma and so-called medulloblastoma are shortly discussed.
    Notes: Zusammenfassung Bei einem zwei Jahre vor dem Tode wegen, eines frontalen Astrozytoms operierten 38jährigen Mann, der jetzt unter dem klinischen Bild eines Rezidivs innerhalb zwei Wochen ad Exitum gekommen war, wurde im alten Operationsareal eine gut abgegrenzte, kleinzellige, mitosenreiche, undifferenzierte Geschwulst offenbar leptomeningealen Ursprungs gefunden. Im angrenzenden Hirngewebe lag eine Wucherung neoplastischer Astrozyten vor, die dem vor zwei Jahren entfernten Tumor weitgehend entsprachen. Übergangsformen zwischen den zwei Tumorzellformen waren nicht feststellbar. Der Fall wird als Koüisionstumor betrachtet, die Ähnlichkeit zwischen dem kleinzelligen Leptomeningealsarkom und dem sogenannten Medulloblastom kurz erörtert.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    European archives of psychiatry and clinical neuroscience 213 (1970), S. 66-77 
    ISSN: 1433-8491
    Keywords: Microglioma ; Mesenchymal Brain Tumour Specifically Localized ; Mikrogliom ; Ortsspezifische mesenchymale Geschwulst
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Es wird das Krankheitsbild einer 61 jährigen Frau mit Mikrogliom und extracerebralen reticulosarcomatösen Herden geschildert. Die Natur und die nosologische Zuordnung des „Mikroglioms“ wird diskutiert. Ihre Einordnung als „ortsspezifische mesenchymale Geschwulst“ des ZNS ist aufgrund des vorliegenden Falles gerechtfertigt.
    Notes: Summary A primary multifocal microglioma in a 61 yr. old woman with extracerebral reticulo-sarcomas is described. Morphological and embryological data are discussed which suggest that this neoplasia belongs to the large group of “mesenchymal brain tumours with specific localization”, which includes the so called medulloblastomas, angioblastomas, meningeal sarcomatosis and midline lipomas.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Journal of neurology 206 (1974), S. 309-326 
    ISSN: 1432-1459
    Keywords: Myopathy, lipid storage ; Myopathy, mitochondrial ; Steroids, response to
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Bericht über eine 37jährige Frau, bei der seit dem 15. Lebensjahr, in schwankender Ausprägung, Schmerzen und Müdigkeit im Schulterund Rückenbereich auftraten. Etwa seit dem 20. Lebensjahr auch Kraftlosigkeit in beiden Beinen. Trotz fortlaufender fachärztlicher Behandlung im ganzen — wenn auch unter wiederholten Remissionen — eher Zunahme der Beschwerden. Mehrfach durchgeführte klinisch-neurologische und laborchemische Untersuchungen sowie EMG- und Röntgendiagnostik blieben ohne klare Ergebnisse. Das klinische Bild wies an pathologischen Veränderungen vor allem schlaffe Paresen 2. bis 3. Grades, besonders der Hüftstrecker und -abductoren auf sowie eine links-betonte proximale Parese 1. Grades beider Beine. Die enzymhistochemischen und elektronenoptischen Untersuchungen von Muskelbiopsien haben eine massive Neutralfetteinlagerungen in den Typ I-Fasern aufgedeckt, ohne sichere mitochondriale Anomalien. Die Beobachtung entspricht der in den letzten Jahren von englischen Autoren beschriebenen “lipid storage myopathy”. Ob hier tatsächlich eine Speicherkrankheit vorliegt im Sinne einer genetisch bedingten Stoffwechselstörung, ist ungewiß. Eher scheint es sich um ein plurigenetisches Gewebssyndrom zu handeln. Die unverbindliche morphologische Bezeichnung „sudanophile (mitochondriale) Myopathie“ oder „Neutralfettmyopathie“ wäre deshalb zunächst vorzuziehen. Die Behandlung einiger dieser Fälle (einschließlich des unsrigen) mit Cortison hat zu einer eindeutigen und bisher anhaltenden Besserung geführt.
    Notes: Summary Report on a 37-year-old woman suffering for 22 years from a peculiar, clinically unclassifiable myopathic syndrome. Repeated laboratory investigations and clinical examinations failed to reveal any abnormality. Enzyme histochemical and electron microscope investigations of muscle biopsies disclosed an elevation of mitochondria and particularly of lipid droplets in the muscle fibers of type I, with no other mitochondrial abnormalities. This case corresponds to the “lipid storage myopathy” recently described by English and American authors. Although the nature of this process is probably dysmetabolic, it is as yet uncertain whether it is a genuine “storage disease”, i.e. an inborn error of metabolism. It seems more probable that it is a plurigenetic tissue syndrome. We believe therefore that the simple morphological definition “sudanophilic (mitochondrial) myopathy” is a more appropriate designation for this process. The myopathy apparently responds to treatment with steroids.
    Type of Medium: Electronic Resource
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