"Chronic Inflammatory Demyelinating Polyneuropathy"--as a clinical entity, an autoimmune, subacute or chronic onset neuropathy with primary attack on the myelin sheathing of nerve fibers. Often follows a relapsing/remitting pattern, and often considered to be the longer-term version of Guillain Barre syndrome.

Take a look at this site:

http://www.neuro.wustl.edu/neuromusc...mdem.html#cidp