Figure 3. (a) Coronal plane STIR image through the brain stem of a 41-year-old woman with multiple sclerosis, presenting with a short history of altered facial sensation. There is a high signal intensity plaque of demyelination within the right brachium pontis (arrow). (b) Axial plane T₂ weighted FSE image at the level of the centrum semiovale. Typical ovoid lesions of primary demyelination in the periventricular and subcortical white matter.

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