I don't know if this has been referred to in this Forum before but it is very interesting.
DEMYELINATING DISEASES OF THE BRAIN
http://spinwarp.ucsd.edu/neuroweb/Text/br-840.htm
This is written by John R. Hesselink, MD, FACR (Fellow of the American Academy of Radiologistsis)
Professor of Radiology & Neurosciences
Department of Radiology
UCSD Medical Center
San Diego, CA .
It is much too large to copy and paste but it is very interesting and tells you what you MIGHT see on MRI's and the different inflammatory diseases that can cause lesions in the brain, including Multiple Sclerosis, Ischemia, and other disorders.
Marcie