Looking for clarification on lesions - new MS patient

[mommehood]

I was diagnosed with MS in June 2014 and had a full battery of baseline MRI's performed. I started Tysabri in Sept and went in for my 6 month set of MRI's today. The neuro spotted 4 "new" lesions in my brain. None of these lesions were "active" with contrast. When I asked my neuro when these may have occurred he said the last 4-6 weeks. But I thought only "active" lesions could be dated within 4-6 weeks of activity.

Wondering if it is possible that 1) these lesions actually developed between June and Sept when my MS was active but I wasn't undergoing treatment or 2) during the 4 months that it takes for Tysabri to become therapeutic? I should mention that I have had no new symptoms since my diagnosis in June.

Now he has me undergoing a test to see if I am creating antibodies to fight the Tysabri which seems a bit premature since I just had my 7th treatment and only have been at therapeutic levels for 1-3 months. I don't have a great relationship with my neuro and he is very short during our visits. Things just aren't adding up so I'm looking to this group for any insight I can get. Thank you!

[rdmc]

Hi mommiehood,

Sorry to hear about the new lesions, glad there are no new symptoms
Ask the neuro why he believes they are relatively new. Other than active lesions,
I wasn't aware that there was a way to tell.

Keep in mind that an MRI is a snapshot in time. Lesions can come and go. Nothing better
illustrates that than this article (which I've posted a bunch in situations like this...and though I've posted the link a lot, every time I go to find it, I sit and watch the time lapse images again, it's just fascinating to me that all that could be going on without any notice of symptoms changing.)

http://www.msdiscovery.org/news/news...more-meets-eye