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Updated January 14, 2008

Definition: Also called a plaque, a lesion is an area of the central nervous system that is inflamed or has been demyelinated. When lesions are present, neurons cannot transmit impulses as efficiently. These lesions are responsible for most symptoms of multiple sclerosis (MS), which differ according to their location in the brain or spinal cord.

Lesions can be seen on MRI scans.

Also Known As: plaques
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  5. Lesions in Multiple Sclerosis - MS Lesions or Plaques

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