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A. Cytology of vitreous cells revealing reactive lymphocytes, plasma cell (insert), and large maligant lymphoma cells identifiable by their prominent nuclei, multiple nucleoli, and scanty basophilic cytoplasm. (Giemsa, original magnification, ×640)
B. Histology of brain biopsy showing large atypical lymphoid cells (arrows) infiltrated the CNS. (hematoxylin & eosin, original magnification, ×200)
