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Photomicrographs. (A) The tumor cells are characterized by high cellularity and nuclear pleomorphism(Hematoxylin-Eosin stain, ×200). There are perivascular pseudorosettes and microvascular proliferations. (B) The cells showed positive reaction for glial fibrillary acidic protein (GFAP) (Immunohistochemical stain, ×200).
