STEVEN NEEDELL / SCIENCE PHOTO LIBRARY STEVEN NEEDELL / SCIENCE PHOTO LIBRARY
MRI (magnetic resonance imaging) scan of the brain of a 30 year old female with multiple sclerosis. The image reveals multiple foci of demyelinating disease throughout the periventricular and deep white matter. A chronic plaque results in a "hole" in the left parietal white matter centrum semiovale corona radiata..
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