“…These antibodies have been reported in 30% to 80% of patients with MMN [8,9,11,13,36,37], but also in some patients with other immune-mediated neuropathy [7,38] and in 5% to 10% of patients with MND [8,36,[39][40][41]. Even if the role of anti-GM1 antibodies in distinguishing MMN from MND was confirmed in two large studies including a metaanalysis [10,11], this aspect remains controversial and testing for this antibodies was not included among the possible supportive laboratory test for the diagnosis of MMN by the American Association of Electrodiagnostic Medicine [42] while they were by the EFNS/PNS [23].…”