Hi there,
I would definitely try to get in to see your Dr. to find out exactly what it all means...Not trying to scare you, just my honest opinion, but from what I know, or can discern, demyelinating means loss of the myelin sheath surrounding your nerves in your spinal column and brain. It sounds to me like they are wanting to do an MRI to possibly rule out Multiple Sclerosis? Not sure if there are other things that could cause demyelating issues... Like I said, don't freak yourself out, you really need a doctor's advice and opinion!! Good luck, please post when you find out the results!

Severe B12 deficiency also causes cord deterioration:
Combined degeneration of the spinal cord:

http://en.wikipedia.org/wiki/Subacut...of_spinal_cord

http://en.wikipedia.org/wiki/Copper_deficiency

copper deficiency is less common.

Demyelination also occurs in some autoimmune diseases, and blood tests can reveal those.

GBS is a rapid demyelination which may occur after some viral infections or vaccines (like meningitis vaccine or Gardisal)