Motor neuron diseases and amyotrophic lateral sclerosis: GM1 antibodies and paraproteinemia.

Sanders, K A; Rowland, L P; Murphy, P L; Younger, D S; Latov, N; Sherman, W H; Pesce, M; Lange, D J · Neurology · 1993

cross_sectional · Level IV

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Abstract

Six of 110 patients (5.5%) with forms of motor neuron disease had abnormal titers of GM1 antibodies of 1:1,600 or higher. Four others came with previously known high titers. Three patients with upper motor neuron (UMN) signs had titers of 1,600; those with probable or no UMN signs had higher titers. Nine patients had conduction block; six of them had abnormal antibody titers, four with 6,400 or higher. Therefore, patients with motor neuron disease and abnormal anti-GM1 titers may have UMN signs or conduction block.

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