临床资料患儿,女,8岁。主因面部水肿性红斑5个月,四肢近端肌无力、肌痛1个月,于2013年9月22日入院。5个月前无明显诱因患儿面颊部出现大小不等红斑,自行外用皮康王、蛇油膏治疗,皮损未见明显好转,此后近3个月未行任何治疗。2个月前患儿眼睑出现红肿,且吞咽硬质食物有哽噎感,就诊于当地县医院,诊断不详,尿常规未见异常,未予治疗。遂就诊于当地某私人诊所,诊断为过敏,给予口服药(具体不详)治疗后, Clinical data children, female, 8 years old. Mainly due to facial edema of the erythema for 5 months, proximal limb weakness, myalgia for 1 month, on September 22, 2013 admission. 5 months ago, there was no obvious incentive for children with different sizes of erythema in the cheek area, their own topical Peikang Wang, snake oil treatment, no significant improvement in skin lesions, after nearly 3 months without any treatment. Eyelid swelling and swallowing hard food 2 months ago, the doctor at a local county hospital, diagnosis is unknown, no abnormal urinary routine, no treatment. Then visit a local private clinics, diagnosed as allergies, given oral medication (specific unknown) after treatment,