1案例资料某男,4岁。3月25日诉头疼,遂由其母陪同至医院就诊。经检查发现男童颈前右侧有一创口,MRI示椎体异物。经调查,3月21日,男童在幼儿园玩耍时,不慎跌倒,手中所持铅笔垂直经颈前插入颈部。幼儿园老师将铅笔拔出,见颈部创伤较小,未出血,便未告知家长;3月27日,男童在医院行椎体异物取出术,术中取出铅笔断端(长1.0cm,宽0.4cm),4月20 1 case information a man, 4 years old. March 25 v. Headache, then accompanied by his mother to the hospital. The examination found that there is a wound on the right side of the neck of the boy, MRI showed vertebral body foreign body. After investigation, on March 21, when a boy was playing in kindergarten, he accidentally fell over and the pencil held in his hand was inserted vertically into the neck through the neck. Kindergarten teacher pulled out the pencil, see the neck less traumatic, did not bleed, they did not inform the parents; March 27, the boy in the hospital line of vertebral body removed surgery, remove the pencil during surgery (1.0cm, width 0.4cm), April 20