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LEMS: Clinical Significance of Pathogenic Autoantibodies Masakatsu Motomura 1 , Takashi Irioka 2 1Medical Engineering Course, Department of Engineering, The faculty of Engineering, Nagasaki Institute of Applied Science 2Department of Neurology, Yokosuka Kyosai Hospital Keyword: ランバート・イートン筋無力症候群 , 小細胞肺がん , P/Q型電位依存性カルシウムチャネル , 自己抗体 , 傍腫瘍性小脳変性症 , Lambert-Eaton myasthenic syndrome , LEMS , small cell lung carcinoma , SCLC , P/Q-type calcium channels , autoantibodies , paraneoplastic cerebellar degeneration , PCD pp.837-845
Published Date 2023/7/1
DOI https://doi.org/10.11477/mf.1416202429
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Abstract

Approximately 90% of patients with Lambert-Eaton myasthenic syndrome (LEMS) are positive for P/Q-type voltage-gated calcium channels (VGCCs) antibodies, and can be broadly divided into two groups: paraneoplastic, especially with small cell lung carcinoma and, non-paraneoplastic, without cancer. Under the Japanese LEMS diagnostic criteria 2022, abnormal electrophysiological results is mandatory for diagnosis in addition to muscle weakness. Contrastingly, autoantibodies are useful for diagnosing the etiology and influence treatment strategies. We comprehensively reviewed the MG/LEMS 2022 practice guidelines. Moreover, we presented a case of PCD without LEMS that was positive for P/Q-type VGCCs antibodies_and discussed the clinical significance of the autoantibodies.


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

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