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Washington University Experience | NEOPLASMS (GLIAL) | Glioblastoma, primitive neuronal component | 4B1 GBM with PNET features (Case 4) GFAP 10.jpg
4B1,2 Reactivity for glial fibrillary acidic protein (GFAP) is strong and diffuse within GBM-like cells, but the vast majority of the PNC-like tumor cells show no reactivity for GFAP. (GFAP IHC)
