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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Acta neuropathologica 93 (1997), S. 271-276 
    ISSN: 1432-0533
    Keywords: Key words Colloid cyst ; Third ventricle ; Pediatric
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Although colloid cysts of the third ventricle are unusual in children, we have recently encountered six examples. Histologically they were lined by cuboidal, pseudostratified or columnar ciliated and mucous-secreting epithelial cells. Two cases showed small microcysts within the fibrovascular stroma surrounding the main cyst. The outermost layer consisted of a glial-ependymal envelope, in keeping with the postulated supraventricular origin of colloid cysts. Scanning electron microscopy showed 10–40% ciliated cells, and no ballooning of non-ciliated cells. Aspiration of cyst contents was performed in three patients, two of whom subsequently required surgical resection 4 months and 8 years after drainage, respectively. In adults colloid cysts may be asymptomatic, whereas in children they have not been documented as incidental findings at autopsy. Two of our six cases died, both before a diagnosis was established. A colloid cyst of the third ventricle must be included in the evaluation of acute neurological deterioration in children, in whom they are more frequently lethal.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-0533
    Keywords: Key words Microtubule-associated proteins ; Epilepsy ; Migration disorders ; Cortical dysplasia
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract We report the enhanced expression of early forms of microtubule-associated proteins (MAPs) in cortical dysplasia in surgical resections from 17 children with intractable epilepsy. Large neurons, which represent one of the characteristic cellular features of cortical dysplasia, showed strong immunoreactivity for MAP1B, as well as the low-molecular-weight isoform of MAP2 (MAP2c). Insitu hybridization with MAP1B antisense riboprobe showed markedly increased hybridization signal intensities in the large neurons, whereas neurons in the normal-appearing cortex and most of the normal-sized neurons in the dysplastic cortex had faint signals. Because MAP2c and MAP1B are early forms of MAPs, which are abundantly expressed in the developing brain and down-regulated in the adult, and are thought to be involved in neuronal outgrowth and plasticity, our results suggest that the structural remodeling of neuronal processes is activated in cortical dysplasia.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Acta neuropathologica 85 (1992), S. 105-110 
    ISSN: 1432-0533
    Keywords: Inclusion body myositis ; Muscle ; Ring fibers
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary A 37-year-old male presenting with a 7-year history of leg weakness was found to have moderate weakness confined to the quadriceps and myopathic changes on electromyography. Serum creatine phosphokinase was 2130 units/liter. Biopsy of the quadriceps muscle revealed an inflammatory myopathy with cytoplasmic and nuclear filamentous inclusions characteristic of inclusion body myositis. An unusual finding was the large proportion of ring fibers along with severe atrophy and fibrosis. The pathogenesis of the ring fibers in this setting is discussed.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Child's nervous system 14 (1998), S. 92-93 
    ISSN: 1433-0350
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1433-0350
    Keywords: Key words Brain ; Encephalitis ; Epilepsy ; Herpes simplex virus ; Temporal lobe ; Polymerase chain reaction
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract We describe the pathological findings and report the detection of herpes simplex virus 1 (HSV1) in the brain in three patients who presented with intractable seizures. All three patients had a previous history of HSV1 encephalitis and went on to develop a medically refractory seizure disorder necessitating surgical intervention. HSV1 encephalitis was clinically diagnosed and treated at 6 months, 3 years, and 7 months and surgical resection was done at 8.5 years, 6 years, and 3 years, in cases 1, 2 and 3, respectively. Pathological examination revealed chronic encephalitis in all three cases, with microglial nodules, intraparenchymal, perivascular and meningeal lymphocytic infiltrates, and gliosis. While immunohistochemical and ultrastructural studies were negative for viral pathogens, polymerase chain reaction (PCR) analysis revealed HSV1 genome. These cases represent examples of chronic herpes encephalitis and seizure disorder with presence of viral genome in the brain long after the initial episode of treated herpes encephalitis.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Pediatric and developmental pathology 2 (1999), S. 197-198 
    ISSN: 1615-5742
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Pediatric and developmental pathology 2 (1999), S. 292-294 
    ISSN: 1615-5742
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Pediatric and developmental pathology 1 (1998), S. 393-404 
    ISSN: 1615-5742
    Keywords: Key words: Walker-Warburg syndrome, testicular dysplasia, micro-orchia, hypogonadism
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: ABSTRACT Two male fetuses (18 and 22 weeks gestation) and a 3-month-old male infant (full sibling of the younger fetus) who were diagnosed with Walker-Warburg syndrome (WWS) on the basis of neuropathologic autopsy findings in brain, eyes, and muscle also had micro-orchia and, microscopically, diffuse gonadoblastoid dysplasia in the testes. Both fetuses also had a miniature left ureter and cystic dysplastic left kidney. Testes from control fetuses of 17–24 weeks gestation with normal karyotype and no central nervous system abnormalities (group A, n = 50), a variety of central nervous system abnormalities (group B, n = 50), or an autosomal aneuploidy syndrome with or without central nervous system abnormalities (group C, n = 30) had no diffuse dysplasia, although a single gonadoblastoid seminiferous tubular profile was present in three controls. Testicular morphology was normal in older fetuses and infants with a wide variety of central nervous system malformations (group D, n = 50). We found no evidence of hypogonadotrophic hypogonadism in the three WWS cases to account for the small penis and incompletely descended testes commonly reported in this condition. We concluded that the apparent specificity of the gonadoblastoid testicular dysplasia to WWS suggests that the gene defect directly affects testicular development.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Pediatric and developmental pathology 1 (1998), S. 254-255 
    ISSN: 1615-5742
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Pediatric and developmental pathology 1 (1998), S. 234-242 
    ISSN: 1615-5742
    Keywords: Key words: brain neoplasm, desmoplastic tumor, ultrastructure, pathology
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: ABSTRACT Primary brain tumors with prominent desmoplasia include the gliofibroma, desmoplastic infantile ganglioglioma (DIG), pleomorphic xanthoastrocytoma (PXA), and desmoplastic cerebral astrocytoma. In the present report, we describe unusual pathological appearances in two successive resections of a left temporal tumor in a patient with complex partial seizures. Both tumors showed focal astroglial and very prominent neuronal differentiation. In the first resection at age 11 years, the tumor showed only focal desmoplastic areas and prominent neuronal differentiation with bizarre atypical giant cells. In the second resection at age 14 years, the morphology was dramatically different. Now the tumor showed marked desmoplasia with tumor cells coexpressing neuronal and glial markers. Electron microscopy showed prominent neuronal differentiation in both resections and presence of basal lamina around tumor cells. Our case represents a unique example of an extraordinary degree of neuronal differentiation in a desmoplastic cerebral tumor. While cellular pleomorphism in a desmoplastic tumor traditionally suggests the diagnosis of PXA, we wish to underscore that many cells exhibiting marked cytologic atypia may in fact be of neuronal rather than of glial origin as in our case.
    Type of Medium: Electronic Resource
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