Correlation of Changes in Gait Parameters, With Phenotype, Outcome Measures, and Electrodiagnostic Abnormalities in a Patient With Anti-MAG Neuropathy After Exacerbation and Improvement.

Gait impairment is a common presentation in patients with IgM anti-myelin-associated glycoprotein (anti-MAG) antibody demyelinating neuropathy. However, current methods used to assess gait are limited. We report spatiotemporal gait parameters captured by GAITRite, a computerized walkway with embedded pressure sensors. The patient worsened after treatment with rituximab and subsequently improved with intravenous immunoglobulin. Serial gait assessments were performed at baseline and after treatment. Spatiotemporal gait parameters correlated with Medical Research Council sum score, Inflammatory Neuropathy Cause and Treatment disability score, and grip strength. Quantitative gait assessment may provide a new dimension to standard clinical evaluation and may help to clarify treatment response in patients with anti-MAG neuropathy when used in combination with other validated assessment tools.