Chronic inflammatory demyelinating polyneuropathy

Chronic inflammatory demyelinating polyneuropathy (CIDP) is an immune-mediated inflammatory disorder of the peripheral nervous system. The disorder is sometimes called chronic relapsing polyneuropathy (CRP) or chronic inflammatory demyelinating polyradiculoneuropathy (because it involves the nerve roots).
CIDP is closely related to Guillain–Barré syndrome and it is thought to be the chronic counterpart of that acute disease. Its symptoms are also similar to progressive inflammatory neuropathy. 
Several variants have been reported. Specially important are: