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- W1604091695 abstract "We report two cases of ependymoma which showed prominent granular cell changes of the cytoplasm. The patients were a 7-year-old boy with a tumor in the cerebellum (case 1) and a 70-year-old man with a tumor in the frontal lobe (case 2). The tumor of case 1 showed a histopathological appearance of ependymoma containing many focal aggregates of large polygonal cells in which the cytoplasm was stuffed with numerous eosinophilic granules. The tumor of case 2 predominantly showed the features of papillary ependymoma, and some tumor cells were swollen and contained similar eosinophilic granules. Intracytoplasmic granules in both tumors were immunoreactive for GFAP and ubiquitin, but not for epithelial membrane antigen, CD68 or mitochondria. Ultrastructurally, they were found as aggregates of membrane-bound, electron-dense, globular structures. Karyotypic analysis of the tumor in case 1 demonstrated 2, 11 and 12 trisomies. Intracytoplasmic eosinophilic granules occasionally occur in astrocytic and oligodendroglial neoplasms, but an appearance of similar granules is very rare in ependymoma. The two cases presented here may represent a new histopathological variant of ependymoma, and the term granular cell ependymoma is appropriate for them." @default.
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- W1604091695 date "2012-02-28" @default.
- W1604091695 modified "2023-09-25" @default.
- W1604091695 title "Ependymoma with “granular cell” features: Report of two cases" @default.
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- W1604091695 doi "https://doi.org/10.1111/j.1440-1789.2012.01298.x" @default.
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