sudden on set of numbness, no pain on both sides; seems to have settled from bottom of feet through chest, then some parts of arm; fingertips. Blood work shows slightly elevated white blood count; no b12 deficiency, iron slightly low, but not very low. MRI norma.
Hi, Well, based upon what you are saying I would have to ask to see the MRI of the brain because a first guess may have been something having to do with the desalinating disease, but you state this was normal.  The other question to ask is whether an MRI has performed on the cervical spine as well as the brain?  I think it's a tough sell to put a single lesion in the spinal cord to cause this type of widespread sensory loss without motor involvement. But if there were anything doing this in the spinal cord it would need to be approximately at the T4 level of the vertebral column. Hope I have answered your query. Let me know if I can assist you further.