患儿，女，3岁，因发热、颜面浮肿、进行性四肢无力50天入院。50天前患儿双眼睑浮肿伴乏力懒动，体温38℃左右，3天后行走困难，全身曾出现“麻疹”样皮疹，用激素后消退；近20天来四肢无力渐加重，不能坐，上肢上举困难，逐渐出现喝水发呛和吞咽困难。查体神清，被动卧位，全 Children, female, 3 years old, due to fever, facial edema, progressive limb weakness 50 days admission. 50 days ago eyelid edema in children with lazy weakness, body temperature about 38 ℃, 3 days after walking difficulties, the body had “measles” like rash, subsided with hormones; nearly 20 days to weakness gradually aggravated, can not sit, upper limbs Difficult to move on, gradually appear to drink choking and swallowing difficulties. Examination of God clear, passive lying, all