Globular glial fibrillary acidic protein-reactive cytoplasmic inclusions in ependymoma: an immunoelectron-microscopic study

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ID: 110540
1970
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Abstract
We report of a 27-month-old boy with a recurrent infratentorial ependymoma; the initial resection was at 14 months of age. Both resection specimens were histologically similar. In addition to neoplastic ependymal cells forming perivascular pseudorosettes, a second population of cells with identical nuclear morphology displayed large hyaline, refractile cytoplasmic inclusions, causing these cells to superficially resemble gemistocytic astrocytes. These inclusions demonstrated strong glial fibrillary acidic protein (GFAP) immunoreactivity. Ultrastructurally, the inclusions appeared as fenestrated irregular-shaped bodies with jagged edges and were made up of electron-dense granular material. Although these inclusions superficially resembled Rosenthal fibers, immunoperoxidase stains for ubiquitin and αB-crystallin were negative. Immunoelectron microscopy showed that these unusual non-filamentous inclusions were diffusely GFAP positive.
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Authors Jeffery L. Twiss;Linda J. Anderson;Dikran S. Horoupian;Jeffery L. Twiss;Linda J. Anderson;Dikran S. Horoupian;
Journal acta neuropathologica
Year 1970
DOI
doi:10.1007/BF00334677
URL
https://link.springer.com/article/10.1007/BF00334677
Keywords
pathology neurosciences

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