患儿，女，8岁，因双下肢无力、烦渴、多尿1天入院。患儿入院前1天突然出现双下肢无力，以右侧为重，但可站立，有运动障碍。无发热，无肌肉酸痛及麻木感。发病当天出现烦渴多饮、尿多、大汗淋漓。入院时不能行走、颈软、头不能抬起、双上肢无力、握力较差、发音障碍。发病前无 Children, women, 8 years old, due to weakness of both lower extremities, polydipsia, polyuria 1 day admission. A day before admission, children with sudden lower extremity weakness to the right side, but can stand up, with dyskinesia. No fever, no muscle pain and numbness. The incidence of polydipsia, polydipsia, sweating. Admission can not be walking, neck soft, head can not lift, weak upper limbs, poor grip, dysphonia. Before the onset of no