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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Acta neuropathologica 10 (1968), S. 132-142 
    ISSN: 1432-0533
    Keywords: Myoclonus body disease ; Lafora bodies ; Electron microscopy ; Corpora amylacea ; Unverricht-Lundborg disease
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Résumé Les auteurs analysent l'ultra-structure des corps de Lafora à propos d'une biopsie cérébrale pratiquée dans une maladie d'Unverricht-Lundborg caractéristique. La surcharge observée dans les périkaryons neuronaux et dans les prolongements dendroaxonaux, au niveau des synapses, comporte des structures filamenteuses hélicoïdales de 75 Å d'épaisseur, correspondant à des macro-molécules protéiques complexes, des corpuscules denses de 150 à 300 Å et une matrice finement granuleuse. Les corps de Lafora, dépourvus de membrane propre, correspondent à une sécrétion anormale ou à une transformation d'organites cellulaires. Des relations de continuité existent entre les filaments et les ribosomes ergastoplasmiques. Les auteurs soulignent les relations unissant corps de Lafora et corps amylacés. Ils discutent leur morphologie et la comparent à celle de plusieurs structures pathologiques connues d'aspect fibrillaire.
    Notes: Summary The authors analyse the Lafora bodies' ultra-structure about a cerebral biopsy in a typic case of Unverricht-Lundborg disease. This obvious storage is noticed in the nerve cells perikarya, dendro-axonal processes and synapses; it appears to be compound of helicoïdal, filamentous, 75 Å wide profiles corresponding to complex proteic macro-molecules, 150–300 Å wide densities and slightly granulous matrix. The Lafora bodies without any limiting membran correspond to a pathologic neuro-secretion or to changes of cytoplasmic organites. Some continuity is seen between filaments and ribosomes. The authors emphazise the relations connecting Lafora bodies and corpora amylacea. Their morphology is discussed and compared with that of several pathologic fibrillar structures.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-0533
    Keywords: Subacute Sclerosing Leucoencephalitis ; Electron Microscopy ; Tubular Inclusions ; Inclusion Bodies (Cristalline Rods, Fibrillar Bundles, Nuclear Bodies, Osmiophilic Particles)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Résumé Les auteurs rapportent 4 observations caractéristiques de LESS: L'analyse ultra-structurale montre: 10 — des inclusions tubulaires intra-nucléaires neuronales ou gliales et intra-axonales de morphologie superposable à celle des nucléocapsides des myxo-virus, de la rougeole en particulier. 20 — des formations non spécifiques: corps nucléaires, faisceaux cristallins et fibrillaires traduisant un trouble métabolique nucléaire, particules osmiophiles liées à une hyperactivité cellulaire. Les inclusions tubulaires virales sont présentes quelque soit la durée de la maladie (3 mois à 5 ans) indiquant l'absence d'autostérilisation virale dans le S.N.C. La LESS apparaît liée au virus rougeoleux mais le mécanisme indirect immunitaire ou métabolique de cette action est inconnu.
    Notes: Summary Four cases of S.S.L.E are reported. The electron microscopy findings show: 1. Tubulary inclusion bodies: They appear in three cases out of four, either in neuronal and glial nucleus or in axis cylinders. Their morphological features are similar to the nucleocapsides of myxoviruses and particularly measles-virus. 2. Other different types of nonspecific inclusions: nuclear bodies, cristalline-like rods and fibrillar bundles which may be considered as the result of a nuclear metabolic disorder, osmiophilic particles which may be seen as the result of a cellular intracytoplasmic hyperactivity. The tubules are found whatever the duration of the disease (3 months up to 5 years) may be. This might indicate that there is no autosterilization of the virus in the C.N.S. during the course of S.S.L.E. According to the most recent papers, such a disease might be interpreted as an infection indirectly induced by measles-virus with an unknown immunologic or metabolic mechanism.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1432-0533
    Keywords: Neuroaxonal Dystrophy ; Infantile Autonomi Nervous System ; Electron Microscopy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The autonomic nervous system is studied by electron microscopy for the first time in two siblings born of North African consanguineous parents and affected by infantile neuroaxonal dystrophy. The changes already reported in dystrophic axons of the central and peripheral nervous system, are seen in the myenteric plexus of rectum mucosa. The authors stress the diffuse involvement of the nervous tissue in this degenerative disorder of still unknown nature.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Acta neuropathologica 34 (1976), S. 65-76 
    ISSN: 1432-0533
    Keywords: Niemann-Pick disease, Crocker's type C ; Ultrastructural study of a case
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The authors report electron microscopic findings in brain, bone marrow and liver biopsies in a case of juvenile Niemann-Pick disease (Crocker's type C). The diagnosis was supported by clinical data increase of blood sphingomyelin and vacuolated histiocytes in bone marrow and liver. Neurons and glial cells were filled with two types of cytosomes: classical multilamellar bodies and unusual pleiomorphic bodies. The latter type probably showed some lipofuscinic component. The relationship between type C and classical Niemann-Pick disease is discussed.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Acta neuropathologica 35 (1976), S. 139-150 
    ISSN: 1432-0533
    Keywords: Electron microscopy ; Olfactory esthesioneurocytoma ; Neurosecretory granules ; Microtubules ; Dystrophic axons
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary One case of malignant tumour of the left nasal cavity is reported in a woman 56 year old, affected by the disease 24 years. Numerous recurrences appeared and various histological diagnoses were performed. At the last surgery, the tumour invaded the ethmoïd and was a typical olfactory esthesio-neurocytoma. By electron microscopy, mature ganglion cells with dense cored vesicles (neurosecretory granules) were densely packed. Neuritic processes with microtubules were rarely normal in size and their content was most often abnormal; furthermore dystrophic axons were noted in great number.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Acta neuropathologica 47 (1979), S. 205-211 
    ISSN: 1432-0533
    Keywords: Brain tumor cells ; Chemical carcinogen ; Benzo(a)pyrene ; Oncogenesis ; Electron microscopy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary An ultrastructural study was performed on normal and Benzo(a)-pyrene (B(a)P)-transformed fetal mouse brain cells. Early subcultures of a strain initiated from whole brain presented three cell types in vitro: astroglial, poorly differentiated glial, and spongioblastic types. After B(a)P-treatment, there was an exclusive transformation and the growth of neuroglia sometimes without gliofibrillary maturation, but with the presence of glial fibrillary acidic protein (GFAP) in the cytoplasm. Early subcultures of another strain initiated from cortex only presented poorly differentiated neuroglial cells. After transformation, cell maturation as evidenced by gliofibrillogenesis and GFAP production by these cells was observed. In both cases, the potentiality of glial differentiation after in vitro malignant transformation by a chemical carcinogen seemed preserved.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Acta neuropathologica 56 (1982), S. 311-314 
    ISSN: 1432-0533
    Keywords: Encephalopathy with hypsarrhythmia ; Spongiform changes of cerebral cortex ; Cell fusion index
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary We report a morphological study of three cases of infantile hypsarrhythmia. The cerebral cortex lesions consisted of a diffuse neuropile microspongiosis, corresponding ultrastructurally to vacuolized and enlarged neuronal processes, particularly postsynaptic bags. The morphological aspects and the high cell fusion index in one case resemble those described in transmissible subacute spongiform encephalopathies.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Acta neuropathologica 15 (1970), S. 327-350 
    ISSN: 1432-0533
    Keywords: Neuroaxonal Dystrophy Infantile ; Electron Microscopy ; Spheroids ; Smooth Endoplasmic Reticulum ; Mitochondria ; Seitelberger's Disease
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Résumé Les auteurs rapportent 2 cas de DNAI.Le tableau clinique, d'évolution mortelle en 2 ans, associe un arrêt du développement psycho-moteur, des signes pyramidaux et extrapyramidaux, un nystagmus pendulaire avec atrophie optique. L'étude en microscopie optique définit:—les aspects morphologiques, la nature glycolipoprotéique et la répartition topographique des sphéroïdes, électivement disposés dans les structures médullaires, bulbo-protubérantielles et cérébelleuses, phylogénétiquement les plus anciennes, —l'atrophie du cortex cérébelleux, —la surcharge soudanophile avec état dysmyélinique du pallidum, —la dégénérescence des voies afférentes et efférentes des fibres longues de la moelle, du tronc cérébral et des voies optiques.L'étude en microscopie électronique précise la structure des sphéroïdes composés d'amas membrano-tubulaires et cisternaux, des corps denses amorphes ou lamellés, multigranuleux, pseudo-cristallins ou multivésiculaires et de mitochondries pathologiques. La formation de ce matériel est liée à l'hyperplasie du réticulum endoplasmique lisse et à l'accumulation de mitochondries anormales dans les péricaryons neuronaux, les prolongements dendro-axonaux, les culs de sacs synaptiques. Les auteurs rapprochent leurs constatations de faits semblables observés en pathologie humaine et expérimentale.
    Notes: Summary Two cases of INAD are reported. Clinical features with fatal issue within 2 years, are characterized by psychomotor retardation, pyramidal and extrapyramidal signs, pendular nystagmus with bilateral atrophia of optic discs.Light microscopy shows:—the morphology of spheroids, their glycolipoproteid component and their elective distribution in medulla, brain-stem and cerebellum, phylogenetically the oldest parts of the CNS—a cerebellar cortical atrophia—sudanophilic fatty deposits associated to status dysmyelinatus of pallidum—a degeneration of pyramidal, spinocerebellar tracts and optic pathways.Electron microscopy in the two cortical biopsies allows to specify the internal structure of spheroids made of membrano-tubular and interconnected aggregates, amorphous and lamellar electron-dense bodies, multigranular bodies, cristalline-like inclusions, multivesicular bodies and involved mitochondria. That complex material represents an overproduction of smooth endoplasmic reticulum and abnormal mitochondria located in neuronal perikarya, axons, dendrites and enlarged synaptic bulbs. These pathological findings are compared to those already described in human and experimental cases.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Acta neuropathologica 62 (1983), S. 31-40 
    ISSN: 1432-0533
    Keywords: Human pinealomas ; Ultrastructure ; Specific markers ; Pinealocyte
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary An ultrastructural study of four pinealomas was carried out to precise eventual specific markers. Dark and clear cells joined with zonulae adherents, extensive and pleiomorphous processes, a complex vacuolar system, and characteristic organelles (lysosome-like structures, clear and dense-core vesicles, vesicle-crowned rodlets and related structures, microtubular sheaves and centriolar derivatives, membranous whorls, fibrous bodies, microtubules, heterogeneous cytoplasmic inclusions) offered a typical pattern. No correlation could be made between the histological and ultrastructural features. The authors stress the ultrastructural similarities between the human tumor cells and the mammalian pineal cells. Pinealomas appeared as a morphological entity distinct from neuronal and astrocytic tumors.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Acta neuropathologica 39 (1977), S. 261-269 
    ISSN: 1432-0533
    Keywords: Giant axons ; Neuropathy ; Neurofilaments ; Microfilaments ; Sympathetic neurons
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary A case of giant axonal neuropathy in a 8 years old child is reported by light and electron microscopy. Clinically, this case is strikingly similar to the rare previous reports and characterized by a distal neuropathy, CNS symptoms and tightly curled hair. Giant axons were found in the sural nerve but had been absent at the onset of the illness. An increase in the number of neurofilaments was found in the axons and neurons of the myenteric plexus. The number of microfilaments was also increased in various types of cells namely Schwann and endothelial cells and fibroblasts: This suggests that the metabolic disorder, probably inborn and genetic, does not only affect the nervous system.
    Type of Medium: Electronic Resource
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