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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Child's nervous system 12 (1996), S. 121-123 
    ISSN: 1433-0350
    Keywords: Tuberous sclerosis ; Subependymal giant cell ; Astrocytoma ; Newborn
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Intracranial tumors are rare in the neonatal period, and generally the most common histological types are astrocytoma, medulloblastoma, choroid plexus papilloma and neuroectodermal tumors. The early diagnosis of these tumors is often very difficult. The authors report a case of a full-term newborn who presented with opisthotonus. A subependymal mass was detected by cerebral ultrasonography, and when the child was 1 month of age depigmentations appeared on the trunk and on the right leg, confirming the suspicion of tuberous sclerosis. At 3 months of age the child suffered infantile spasm with hypsarrhythmia. The developmental delay, the marked progressive neurological deterioration and the daily seizures suggested surgical resection. Histologic studies showed a subependymal giant cell astrocytoma such as typically occurs in tuberous sclerosis.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1433-0350
    Keywords: Key words Microgyria ; Corpus callosum ; Peroxidase ; Development ; Cerebral cortex ; Dysplasia
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  The anatomical organization of projections from the microgyric cortex to the contralateral hemisphere through the corpus callosum has been studied in the rat. Microgyria was induced on the first postnatal day by a freezing injury. Once adult, animals received injections of horseradish peroxidase in the cortex contralateral to the lesion. Callosally projecting neurons located in the normally layered cortex adjoining the focal lesion showed a different laminar distribution from that observed in control animals. The highest percentage of callosal neurons was found in layer 6 in lesioned animals, whereas layers 2/3 and 5 gave rise to most of interhemispheric projections in controls. Possible mechanisms leading to the establishment of aberrant callosal connections and potential implications for the human pathology are discussed.
    Type of Medium: Electronic Resource
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