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(a) Photomicrograph showing pseudorosettes in a case of ependymoma; (b) Photomicrograph showing anchoring of tumor cells to blood vessels by short stout processes, in a case of astroblastoma (H and E, ×100); (c) Photomicrograph showing high power view of tumor cells with processes arranged around blood vessels (H and E, ×400); (d) Photomicrograph showing cells with clear cytoplasm and well defined plasma membrane in a case of oligodendroglioma (H and E, ×400)
