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ependymoblastoma

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ependymoblastoma
[ipen′dimōblastō′mə]
a malignant neoplasm composed of primitive cells of the ependyma. Also called malignant ependymoma.


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There are now major subsections defining CNS/supratentorial PNET (which also includes neuro-blastoma and ganglioneuroblastoma), medulloepithelioma, and ependymoblastoma.
Ependymoblastoma, which occurs in infants and children under three years, is no longer considered a subtype of ependymoma.
On frozen section analysis, anaplastic ependymoma is less likely to show characteristic perivascular pseudorosettes, and its distinction from ependymoblastoma (PNET with ependymoblastic differentiation) may be difficult (Figures 11 and 12).
 
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