CIDP

If you have a diabetic neuropathy it is more likely that you have CIDP.
IVIg helps take care of this. Check www.cidpusa.org

Polyneuropathy

The most common cause of polyneuropathy is inflammation. So the CRP or Sedrate of the patient should be checked.
This is a treatable condition so if the B12 level is normal then in all patients with polyneuropathy one should consider CIDP.

This is easily treated with IVIg.

please read http://www.cidpusa.org for much more info
Imran Khan MD