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  • 1
    ISSN: 1432-0533
    Keywords: Dementia ; Parkinsonism ; Substantia nigra
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary We have recently encountered a patient with progressive dementia and parkinsonism beginning at the age of 68 years and developing for 2 years. Pathological examination revealed severe degeneration exclusively in the substantia nigra with absence of Lewy bodies and neurofibrillary changes. The features of this case are reported and discussed.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-0533
    Keywords: Mitochondrial encephalomyopathy (MELAS) ; Mitochondrial angiopathy ; Smooth muscle and endothelial cells ; Pial arteriole and small artery
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary We studied cerebral blood vessels of two autopsied patients with mitochondrial myopathy, encephalopathy, lactic acidosis, and stroke-like episodes (MELAS). All the main cerebral arteries in the proximal portion at the brain base and more distal portion at the cortical surface, as well as within the brain parenchyma were examined by electron microscopy. There was a striking increase in number of mitochondria in the smooth muscle and endothelial cells, which were most prominent in the pial arterioles and small arteries up to 250 μm in diameter and less frequent and severe in the larger pial arteries and intracerebral arterioles and small arteries. These vascular changes have not hitherto been described in MELAS, or in other disorders affecting blood vessels of the brain and other organs. It is suggested that the vascular changes are caused by primary mitochondrial dysfunction in the vascular smooth muscle and endothelial cells of the brain and that they constitute the pathogenic base of the brain lesions and their unusual distribution pattern in MELAS.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Acta neuropathologica 73 (1987), S. 227-232 
    ISSN: 1432-0533
    Keywords: Paraganlioma ; Tyrosine hydroxylase(TH) ; Immunohistochemistry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary An immunohistochemical study on tyrosine hydroxylase (TH), a rate-limiting enzyme in the catecholamine synthesizing pathway, was made on three cranioncervical region paragangliomas, two of which showed metastases to the cervical lymph nodes. In all of the original tumors, the majority of tumor cells showed positive immunostaining for TH of variable intensity in their cytoplasm regardless of their cytological features such as cellular and nuclear pleomorphism. The finding suggests that most tumor cells are capable of production of catecholamines and are derived from chief cells in the normal paraganglia. In cervical lymph nodes, however, no positive immunostaining for TH was observed in metastatic tumor cells, in contrast with the findings in the original tumors. The absence of TH immunoreactivity in metastatic tumor cells appears to be noteworthy in considering their malignant potential. Application of the TH immunohistochemistry to further cases appears important for the better understanding of this neoplasm, a catecholamine-producing tumor.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1432-0533
    Keywords: Progressive supranuclear palsy ; Neocortex ; Neurofibrillary tangles ; Straight tubules ; Twisted tubules
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Ultrastructural investigations were carried out on the cerebral neocortex in two cases of progressive supranuclear palsy. In both cases, characteristic 15-nm-wide straight tubules were observed in the neurons. The numbers of cells containing the straight tubules and of tubules in individual cells were small. However, the occurrence of the tubules strongly suggests that the cerebral neocortex is also exposed to the disease process in progressive supranuclear palsy.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Acta neuropathologica 80 (1990), S. 118-122 
    ISSN: 1432-0533
    Keywords: Mitochondrial encephalomyopathy ; Extraocular muscle ; Ultrastructure ; Mitochondrial myopathy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary We carried out a histological examination of the extraocular muscles (EOMs) in a case of myoclonus epilepsy associated with ragged-red fibers (MERRF) and two cases of mitochondrial myopathy, encephalopathy, laetic acidosis, and stroke-like episodes (MELAS), which did not manifest external ophthalmoplegia clinically. By light microscopy, many granular and vesicular fibers were seen associated with endomysial fibrosis. Electron microscopy revealed that the fibers showed prominent accumulation of abnormal mitochondria, extensive loss of myofibrils, proliferation of free sarcoplasmic reticulum and an increased amount of lipid vacuoles. These changes were more pronounced in MELAS than in MERRF. Hirano bodies were often seen in the subsarcolemmal area of muscle fibers and also in the intramuscular myelinated nerve fibers and axon terminals. These findings suggest the presence of mitochondrial myopathy of the EOMs in cases of MELAS and MERRF.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Acta neuropathologica 84 (1992), S. 465-470 
    ISSN: 1432-0533
    Keywords: Amyotrophic lateral sclerosis ; Clarke's column ; Bunina body ; Spheroid ; neuronal loss
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Histological, ultrastructural and morphometrical observations on Clarke's column were carried out in 18 patients with sporadic amyotrophic lateral sclerosis (ALS) and 15 age-matched control subjects. Of the 18 ALS patients 6 had been on a respirator before death. Bunina bodies were found in the neuronal cytoplasm in 7 of the 12 non-respirator-supported ALS patients and in 3 of the 6 respirator-supported patients. The number of spheroids was significantly higher in the non-respirator-supported patients (P〈0.01) than in the control subjects; however, the number in the respirator-supported patients was about equal to that in the controls. The number of neurons in Clarke's column in the non-respirator-supported ALS patients was not reduced, but in the respirator-supported patients they tended to disappear with time after respiratory support. These findings suggest that Clarke's column neurons are also involved primarily in the disease process in sporadic ALS. However, they may begin to disappear only after the patients require respiratory support.
    Type of Medium: Electronic Resource
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  • 7
    ISSN: 1432-0533
    Keywords: Motor neuron disease ; Amyotrophic lateral sclerosis ; Extrapyramidal system Reticular formation ; Ophthalmoparesis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract We carried out a postmortem examination on two Japanese patients, 64- and 80-year-old men whose survival was prolonged with an artificial respirator. They had no family history of neuropsychiatric disorders and were suspected, clinically, as having a motor neuron disease that differed from amyotrophic lateral sclerosis (ALS). As well as upper and lower motor neuron impairment, they showed a variety of symptoms, such as sensory disturbances, hypohidrosis, impotence, ophthalmoparesis and/or atonic neurogenic bladder, and their protein content in cerebrospinal fluid was elevated markedly. Pathological examination revealed the following extensive nervous system involvement: (1) the upper and lower voluntary motor systems, including the IIIrd, IVth and VIth cranial nerve nuclei: (2) the reticular formation and its major afferent pathways; (3) the vestibulospinal and tectospinal systems; (4) the spinocerebellar system and the exteroceptive somatic afferent pathways; (5) the dentatorubral and pallidoluysian system; and (6) the substantia nigra, locus ceruleus and intermediolateral and Onufrowicz's nuclei. Neither Bunina bodies, Lewy body-like hyaline inclusions nor ubiquitin immunoreactive skein-like structures were observed. The distribution of the lesions was quite different from that in patients with ALS and the other known related diseases. Recently, seven autopsied cases with clinical and histopathological similarities to our patients have been reported in Japan. Our conclusion is that our two and these seven patients should be classified as having a new motor neuron disease entity, which can be is differentiated from ALS.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Acta neuropathologica 56 (1982), S. 13-16 
    ISSN: 1432-0533
    Keywords: Ataxia-telangiectasia ; Hepatocytes ; α-Fetoprotein ; Hepatitis B surface antigen ; Immunoperoxidase method
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Paraffin sections of liver, thymus, and associated tumor tissue from five autopsied patients with ataxia-telangiectasia (AT) were examined for the presence of α-fetoprotein (AFP) and hepatitis B surface antigen (HBsAg) by the immunoperoxidase method. In all the autopsied patients, the presence of both AFP and HBsAg was detected in the hepatocytes, but not in the cells of the thymus or tumor tissue. These results support the view that the liver is not fully developed in patients with AT and suggest that persistent infection with hepatitis B virus (HBV) may play an important role in the etiology and pathogenesis of AT.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Acta neuropathologica 61 (1983), S. 173-177 
    ISSN: 1432-0533
    Keywords: Neurofibroma ; Tactile-like corpuscle ; Schwann cell ; Meissner corpuscle ; S-100
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Tactile-like corpuscles in neurofibroma tissues were examined by the indirect immunoperoxidase method using rabbit anti-S-100 sera. In all five cases examined, positive staining was observed in their constituent cells, both in the flattened cytoplasm and nuclei. On examination of the normal peripheral nervous system, positive staining was exclusively confined to Schwann cells in the nerve bundles and Schwann-related cells such as lamellar cells in the Meissner corpuscle, whereas staining was negative in perineurial cells. Electron-microscopic examination showed ultrastructural similarity between constituent cells of the tactile-like corpuscles in neurofibroma and lamellar cells in the Meissner corpuscle. These findings may indicate Schwannian nature of the tactile-like corpuscles.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Acta neuropathologica 66 (1985), S. 37-41 
    ISSN: 1432-0533
    Keywords: Catecholamine neuron ; Tyrosine hydroxylase ; Alzheimer's neurofibrillary change ; Immunohistochemistry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Immunohistochemistry with antisera against tyrosine hydroxylase was performed on neurons with Alzheimer's neurofibrillary changes in the substantia nigra and locus ceruleus. These specimens were obtained from brains with Alzheimer's disease, Pick's disease, progressive supranuclear palsy, Alzheimer's type parkinsonism, parkinsonism-dementia complex on Guam, and normal aging. Under these neurologic conditions the affected cate-cholamine neurons with Alzheimer's neurofibrillary changes were stained positively with antisera against tyrosine hydroxylase. The results suggested that in these neurons, Alzheimer's neurofibrillary changes seemed to develop independently before the reduction of tyrosine hydroxylase protein synthesis.
    Type of Medium: Electronic Resource
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