Just some suggestions. I think that your back surgery resulted in something pushing on your spine. Get another MRI and talk to a back specialist to see what they think may be the problem. It could be assisted by a surgeon who specializes in microsurgery. He might be able to carve away the bone or scares that may be pushing on the spine. Good Luck- the disease really sucks. You may only stop some progression. My microsurgeon stopped my drop foot but not the neuropathy that still progresses in my feet.