Pathologically, these plaques consist of a discrete region of demyelination with relative preservation
of axons. Plaques suggestive
of MS are typically found on
MRI in the periventricular region, corpus callosum, centrum semiovale, and, to a lesser extent, deep white matter structures and basal ganglia.
Labyrinthitis will present with inflammation (increased activity) in the inner ear structures. Generally, labyrinthitis is a unilateral finding.