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Neuropathological findings. a The enlarged oligodendrocyte (arrow) contains a glassy nucleus, characteristic of viral inclusion bodies combined with reactive astrocytes (asterisks) (hematoxylin-eosin, ×400). The macrophages (arrowheads) contain cytoplasmic myelin particles, indicating active demyelination. b Myelin particles (arrowheads), stained in blue (Luxol fast blue, ×400).
