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病例摘要:患儿,女,3岁,因步行障碍2天于1984年3月19日入院。患儿入院前1周发热、出水痘,经肌注维生素B_(12)等治疗6天后热退、水痘结痂。入院前2天,突然发现患儿行走不稳,门诊考虑为药物注射性疼痛所致,给予对症处理无好转而住院治疗。查体:体温36.4℃,脉搏100次,神志清楚,呼吸平稳。皮肤可见水痘后痂痕。咽部轻度充血,颈无抵抗。心肺正常。双下肢肌力正常,腱反射存在,病理反射未引出。患儿可扶着床边蹦跳,但行走时双下肢抖动,躯干左右摇晃。化验检
Case Summary: Children, 3 years old, admitted to hospital on March 19, 1984 due to walking disorder for 2 days. Children with fever 1 week before admission, chicken pox, intramuscular injection of vitamin B_ (12) and other heat treatment after 6 days retreat, chickenpox scab. 2 days before admission, suddenly found that children walking unsteadily, outpatient considered as drug-induced pain caused by symptomatic treatment to give no improvement and hospitalization. Physical examination: body temperature 36.4 ℃, pulse 100 times, conscious, breathing stable. Scab marks visible after skin varicella. Pharyngeal mild congestion, neck without resistance. Cardiopulmonary normal. Both lower extremity muscle strength, tendon reflex exists, the pathological reflex did not lead. Children can be bouncing bedside, but when walking double lower extremity jitter, trunk shaking around. Laboratory examination