I just ran across this article on PPMS an hour ago and found it to be very interesting, especially the part about "MRI's not showing any iflammation/lesions on the brain", not even with contrast dye. Here is the link:
Any one here with PPMS should definately read this, as well as those of you who have been brushed off by your Neuro.'s b/c your MRI's looked "normal". May not be the case, according to the article! Also talks about the different treatment strategies of all MS types and new research.