I just got my MRI results back after having infusion #12. Still no changes--no enhancement and no new lesions. I almost had a serious anxiety attack since it took them a week to get back to me unlike previous MRIs. I finally called and demanded the results! So I guess the Tysabri is working extremely well.

I have also noticed that my fatigue level has improved significantly, back to pre-MS and pre-mono days, and my ability to tolerate heat is almost normal now. It's been 100-102 degrees here for days and I've been outside walking around, traveling, running errands etc. and have had no problems. Wow!