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Multifocal Motor Neuropathy So Kanda 1 , Takashi Kanda 2 1Department of Neurology and Clinical Neuroscience, Yamaguchi University Graduate School of Medicine 2Neuromuscular Center Yoshimizu Hospital Keyword: 多巣性運動ニューロパチー , MMN , 免疫グロブリン大量静注療法 , IVIg , 伝導ブロック , 鑑別診断 , 筋萎縮性側索硬化症 , ALS , multifocal motor neuropathy , intravenous immunoglobulin , conduction block , differential diagnosis , amyotrophic lateral sclerosis pp.526-533
Published Date 2024/5/1
DOI https://doi.org/10.11477/mf.1416202639
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Abstract

Multifocal motor neuropathy (MMN), an acquired chronic progressive immune-mediated motor neuropathy, is characterized by asymmetrical distal upper limb muscle weakness and muscle atrophy without sensory impairment. Differentiation from amyotrophic lateral sclerosis is usually challenging, and electrophysiological studies show multifocal conduction blocks. Immunoglobulin (Ig)M GM1 antibodies are detected in approximately 50% of patients. In contrast to chronic inflammatory demyelinating polyneuropathy, corticosteroids are ineffective for management of MMN, and IVIg is the sole established treatment.


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電子版ISSN 1344-8129 印刷版ISSN 1881-6096 医学書院

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