Summary
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.
References
Abe H, Yagishita S, Itoh K, Hamano S (1992) Novel eosinophilic inclusion in astrocytes. Acta Neuropathol 83:659–663
Cruz-Sanchez EF, Rossi ML, Hughes JT, Cervos-Navarro J (1987) An immunohistological study of 66 ependymomas. Histopathology 13:443–454
de Armond SJ, Eng LF, Rubinstein LF (1980) The application of glial fibrillary acidic (GFA) protein immunohistochemistry in neurooncology. Pathol Res Pract 168:374–394
Duffy PE, Graf L, Huang Y-Y, Rapport MM (1979) Glial fibrillary acidic protein in ependymomas and other brain tumors. J Neurol Sci 40:133–146
Eng LF, Vanderhaeghen JJ, Bignami A, Gerstl B (1971) An acidic protein isolated from fibrous astrocytes. Brain Res 28:351–354
Freide RL, Pollack A (1978) The cytogenetic basis for classifying ependymomas. J Neuropathol Exp Neurol 37:103–118
Goebel HH, Cravioti H (1972) Ultrastructure of human and experimental ependymomas. J Neuropathol Exp Neurol 31:54–71
Goldman JE, Corbin E (1991) Rosenthal fibers contain ubiquinated αB-Crystallin. Am J Pathol 139:933–938
Horoupian DS, Dickson DW (1991) Striatonigral degeneration, olivopontocerebellar atrophy, and ‘aytpical’ Pick disease. Acta Neuropathol 81:287–295
Horoupian DS, Kress Y, Yen S-H, Gaskin F (1980) Nickel-induced changes and reappraisal of Rosenthal fibers in focal CNS lesions. J Neuropathol Exp Neurol 41:664–675
Iwaki T, Wisniewski T, Iwaki A, Corbin E, Tomokane N, Tateishi J, Goldman JE (1992) Accumulation of aB-crystallin in central nervous system glia and neurons in pathologic conditions. Am J Pathol 140:345–356
Janzer RC, Friede RL (1981) Do Rosenthal fibers contain glial fibrillary acid protein? Acta Neuropathol (Berl) 55:75–76
Kaneko Y, Tadeshita I, Matsushima T, Iwaki T, Tashima T, Fukui M (1990) Immunohistochemical study of ependymal neoplasms: histological subtypes and glial and epithelial characteristics. Virchows Arch [A] 417:97–103
Kawano N, Yada K, Yagishita S (1989) Clear cell ependymoma: a histological variant with diagnostic implications. Virchows Arch [A] 415:462–472
Lach B, Sikorska M, Rippstein P, Gregor A, Staines W, Davie TR (1991) Immunoelectron microscopy of Rosenthal fibers. Acta Neuropathol 81:503–509
Lowe J, Morrell K, Lennox G, Landon M, Mayer RJ (1989) Rosenthal fibers are based on the ubiquitination of glial filaments. Neuropathol Appl Neurobiol 15:45–53
Lucas CV, Bensch KG, Eng LF (1980) In vitro polymerization of the glial fibrillary acidic protein extracted from multiple sclerosis brain. Neurochem Res 5:247–255
Minagawa M, Shioda K, Shimizu Y, Isshiki T (1992) Inclusion bodies in cerebral cortical astrocytes: a new change of astrcytes. Acta neuropathol 84:113–116
Mørk SJ, Løken AC (1977) Ependymoma: a follow-up study of 101 cases. Cancer 40:907–915
Murayama S, Bouldin TW, Suzuki K (1992) Immunocytochemical and ultrastructural studies of eosinophilic granular bodies in astrocytic tumors. Acta Neuropathol 83:408–414
Nakamura Y, Takeda M, Angelides KJ, Tada K, Hariguchi S, Nishimura T (1991) Assembly, disassembly, and exchange of glial fibrillary acidic protein. Glia 4:101–110
Papp MI, Kahn JE, Lantos PL (1989) Glial cytoplasmic inclusions in the CNS of patients with multiple system atrophy (striatonigral degeneration, olivopontocerebellar atrophy, and Shy-Drager syndrome). J Neurol Sci 94:79–100
Roessman U, Velasco ME, Sindely SD, Gambetti P (1980) Glial fibrillary acidic protein (GFAP) in ependymal cells during development. An immunohistochemical study. Brain Res 200:13–21
Russell DS, Rubinstein LJ (1989) Pathology of tumors of the Central Nervous System, 5th edn. Williams and Wilkins, Baltimore, pp 192–206
Sarnat HB (1992) Regional differences of the human fetal ependyma: immunocytochemical markers. J Neuropathol Exp Neurol 51:58–75
Taylor LP, Rorke LB, Packer R (1986) PAS-positive granules in childhood ependymomas: a clinicopathological study. Ann Neurol 20:397–398
VandenBerg SR, Ludwin SK, Herman MM, Bignami A (1976) In vitro astrocytic differentiation from embryoid bodies of an experimental mouse testicular teratoma. Am J Pathol 83:197–212
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Twiss, J.L., Anderson, L.J. & Horoupian, D.S. Globular glial fibrillary acidic protein-reactive cytoplasmic inclusions in ependymoma: an immunoelectron-microscopic study. Acta Neuropathol 85, 658–662 (1993). https://doi.org/10.1007/BF00334677
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF00334677