Abstract

目的提高对罕见的抗髓鞘相关糖蛋白(MAG)抗体阳性的IgM相关性周围神经病(IgM-PN)的认识。方法总结2014年1月至2019年4月北京协和医院诊断的11例抗MAG抗体阳性的IgM-PN患者的临床特点、实验室检查、治疗方案和预后。结果11例患者中,男8例,女3例,中位发病年龄63(52~77)岁。其中9例患者以远端肢体麻木起病,6例伴肌力减退。神经传导速度检查示,均为周围神经脱髓鞘损害,以下肢感觉神经损害为主,6例伴慢性轴索损害。11例患者均存在血清IgM型单克隆免疫球蛋白,6例为IgM κ型,3例为IgM λ型,2例为IgM κ/IgG κ双克隆型。3例患者继发于巨球蛋白血症。11例患者的血清抗MAG抗体均为阳性。9例患者接受利妥昔单抗单药或联合化疗,治疗后7例患者的神经症状稳定或改善。结论抗MAG抗体阳性的IgM-PN是一种罕见的M蛋白相关性疾病。对于伴IgM型M蛋白的周围神经病患者,应常规筛查抗MAG抗体。基于利妥昔单抗的治疗可作为其一线治疗方案。

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