Abstract
Antibody reactivity to GA1, GM1, GM2, GD1a, GD1b, and GQ1b gangliosides was measured in 87 patients with polyneuropathy associated with monoclonal gammopathy (60 IgM, 25 IgG, 2 IgA) and 42 control patients with monoclonal gammopathy without polyneuropathy (21 IgM, 21 IgG). Of these 87 patients, 30% had anti-myelin-associated glycoprotein antibodies and 15% had antiganglioside antibodies. Antiganglioside antibodies were significantly associated with demyelinating neuropathy and with IgM monoclonal gammopathy. Anti-GD1b and anti-GQ1b antibodies were significantly associated with predominantly sensory ataxic neuropathy.
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