Progressive forms are dx after observation. If you were dx with RRMS, then you can move to Secondary. Primary is it's own dx. My neuro told me that lesions in the brain tend to signal more cognitive issues, while those on the spine tend to signal more motor issues. There is nothing definite in MS. A really good book is MS for Dummies. It has lots of info on MS. Most of my MS lesions are on my spine. I am full time on a walker and wheelchair, but can still walk somewhat. Everyone's MS is different, so there's no way to tell your future.

I was diagnosed RRMS with both thoracic and cervical lesions. After a yr on meds my cervical spine is stable, thoracic not tested and brain shows more non active lesions. I @exercise 2 times a week..pretty active for most part. No mobility issues yet. Balance is a little worse.