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Washington University Experience | NEOPLASMS (EMBRYONAL) | Medulloblastoma, Histologically Defined | Classic Subtype | 9D Medulloblastoma (Case 9) GFAP 2
GFAP stains only reactive astrocytes within the neoplastic elements. ---- Not shown: The INI-1 stain shows retained nuclear expression. The Ki-67 labeling index is high. The morphologic and immunohistochemical features are consistent with the diagnosis of medulloblastoma, WHO grade IV.
