患儿男,13岁,因双下肢肌肉酸痛乏力5d,伴低热于2003年12月10日入我院风湿科。患儿半个月前曾患水痘,痊愈后出现双下肢肌肉酸痛,蹒跚步态,不能跑步,下蹲后不能站起,双上肢抬举尚可,上下楼梯费力,伴低热。病程中无咳嗽咯痰、鼻塞流涕、咽痛等症,无胸闷气喘。既往曾有麻疹、腮腺炎 Male, 13 years old, because of muscle weakness of both lower extremities 5d, with fever in December 10, 2003 into our hospital rheumatology. Two weeks ago suffered from chickenpox in children, lower extremity muscle soreness after recovery, staggering gait, can not run, can not stand up after squatting, lifting upper limbs still, up and down stairs effortlessly, with fever. No cough in the course of expectoration, stuffy nose runny nose, sore throat embolism, no chest tightness and wheezing. Previously had measles, mumps