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Foamy oligodendrocytes

Light microscopy of toluidine blue thick sections of plastic embedded glutaraldehyde fixed tissue (400 magnification). (Arrows) Foamy oligodendroglia cells with abundant foamy to granular cytoplasm. (Arrowheads) Fragments of foamy oligodendroglia cells cytoplasm artifactually separated from the foamy oligodendroglia cells by planar sectioning. (Contributed by Dr. Raphael Schiffmann.)