You have had much testing – bloodwork, EMG, MRIs, etc. Compare your exam experience with these recommendations from the University of Chicago: http://peripheralneuropathycenter.uchic ... #bloodtest
Especially important is this section on blood tests:
Blood tests are commonly employed to check for vitamin deficiencies, toxic elements and evidence of an abnormal immune response.
Depending on your individual situation, your doctor may request certain laboratory tests to identify potentially treatable causes for neuropathy. These include tests for:
Vitamin B12 and folate levels (Jimmylegs, here at TIMS, recommends magnesium, zinc, and copper also.)
Thyroid, liver and kidney functions – I think you have said that the thyroid was checked.
Oral glucose tolerance test (I suggest a "fasting blood insulin test" also.)
Antibodies to nerve components (e.g., anti-MAG antibody)
Antibodies related to celiac disease (I think this is VERY important, as well as a mannitol-lactulose test for Intestinal Permeability.)
Lyme disease – I believe you have had this investigated, too.
Hepatitis C and B
Discuss areas not already tested with your doctor.
My hypothesis: excess insulin (hyperinsulinemia) plays a major role in MS, as developed in my initial post: http://www.thisisms.com/forum/general-discussion-f1/topic1878.html "Insulin – Could This Be the Key?"