Epithelial properties of pleomorphic xanthoastrocytomas determined in ultrastructural and immunohistochemical studies |
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Authors: | T. Iwaki M. Fukui A. Kondo T. Matsushima I. Takeshita |
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Affiliation: | (1) Department of Neuropathology, Neurological Institute, Faculty of Medicine, Kyushu University 60, 3-1-1 Maidashi, Higashi-ku, 812 Fukuoka, Japan;(2) Department of Neurosurgery, Neurological Institute, Faculty of Medicine, Kyushu University 60, 3-1-1 Maidashi, Higashi-ku, 812 Fukuoka, Japan |
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Abstract: | Summary Three cases of pleomorphic xanthoastrocytoma (PXA), one of which showed anaplastic evolution, are described. In all three the PXA tumors were well circumscribed and could be totally removed. Light-microscopically, pleomorphic tumor cells clustered gregariously and often formed alveolar structures. Electron microscopy revealed various epithelial properties, such as junctions and interdigitations between apposing tumor cells, and prominent basal laminae surrounding tumor nests. The circumscribed growth of PXA, as contrasted with an infiltrative growth of usual astrocytoma, can be attributed to the cellular cohesion based on the epithelial properties of the tumor cells. In the third patient, tumor recurred 6 months postoperatively. Although the recurrent tumor retained the alveolar structures, pleomorphism and various degenerative features of the tumor cells diminished with advance in the proliferative activities.Supported in part by grant in aid 60480328 from the Ministry of Education, Science, and Culture, Japan |
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Keywords: | Pleomorphic xanthoastrocytoma Epithelial properties Circumscribed growth Electron microscopy Immunohistochemistry |
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