GBS consists of a number of subtypes showing different clinical
and pathological features. GBS is classifi ed by pathological and
electrodiagnostic criteria (Feasby et al. 1986, Griffi n et al. 1995,
Choudhury and Arora 2001) into the following subtypes: acute
infl ammatory demyelinating polyneuropathy (AIDP); Fisher
syndrome—acute motor and sensory axonal neuropathy (AMSAN);
and acute motor axonal neuropathy (AMAN). After treatment,
conduction studies may or may not revert toward normal values
(Toyka et al. 1980, Vriesendorp et al. 1991).
According to some authors, MMN is a unique variant of CIDP
(Parry 1985, Parry and Clarke 1985, Pestronk et al. 1988). A critical
diagnostic feature in MMN is the demonstration of conduction
block in the multiple ...