患者,男,73岁,主因“全身多处皮疹6月余,复发伴四肢乏力1月余”于2014年11月20日收入四川省人民医院风湿免疫科。患者6月余前无明显诱因出现双手、双踝、双下肢小腿外侧暗红色皮疹,当地医院诊断为神经性皮炎,予以外用药物涂擦后皮疹逐渐消退。1月余前患者无明显诱因出现四肢乏力,举物、梳头、穿衣等动作受限,伴吞咽困难,病程中渐出现双眼睑水肿性暗紫色红斑,颈部充血性红 Patients, male, 73 years old, mainly due to “systemic multiple rash more than 6 months, recurrence with limb weakness more than 1 month ” on November 20, 2014 income Sichuan Provincial People’s Hospital Department of Rheumatology. Patients before six months no obvious incentive to appear hands, ankles, double leg lower extremity dark red rash, the local hospital diagnosed as neurodermatitis, topical drug rubbed rash subsided. Before January, there was no obvious incentive in patients with limb weakness, lifting things, combing hair, clothing and other movements are limited, with swallowing difficulties, the gradual emergence of double eyelid edema during the course of dark purple erythema, congestive neck red