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!