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EGFR GBM tumors express markers of astrocytic differentiation. Representative photomicrographs of GBM tumors of the indicated genotypes stained with H&E, for expression of EGFR, the astrocytic markers glial fibrillary acidic protein (GFAP) and S100 and the neuronal marker NeuN by IHC. N, normal brain; T, tumor. (Scale bars: 62.5 μM.)
