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Glioneuronal Phenotype in a Diencephalic Pilomyxoid Astrocytoma
Journal article   Peer reviewed

Glioneuronal Phenotype in a Diencephalic Pilomyxoid Astrocytoma

Jean-Pierre de Chadarévian, Gregory E. Halligan, Goutham Reddy, Louise Bertrand, Judy M. Pascasio, Eric N. Faerber and Christos D. Katsetos
Pediatric and developmental pathology, v 9(6), pp 480-487
Nov 2006
PMID: 17163791

Abstract

We report the presence of divergent populations of cells in a hypothalamic/chiasmatic pilomyxoid astrocytoma of an 11-month-old male, exhibiting differential immunohistochemical localizations for glial fibrillary acidic protein (GFAP) and synaptophysin. The tumor cells were negative for Neu-N and neurofilament protein. Ultrastructurally, the tumor comprised 2 cell types, one with features attributable to a neuronal phenotype alongside cells exhibiting an overt astroglial phenotype. This composite organization was confirmed by confocal microscopy, which revealed 2 distinct, albeit tightly interwoven, populations of GFAP and synaptophysin-labeled tumor cells. Our results indicate that a subset of the so-called pilomyxoid astrocytomas of the hypothalamic/chiasmatic region may represent phenotypically mixed glioneuronal neoplasms distinct from the pilocytic astrocytomas.

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Web of Science research areas
Pathology
Pediatrics
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