患者，男，4岁，因咳嗽2月就诊于小儿内科。胸透发现“气管内金属异物”而转耳鼻咽喉科。既往无咯血、呼吸或吞咽困难史，吸入或吞入异物史不详，体检：发育营养一般，心、肺无异常发现。胸部工、侧位平片示扁圆形不透X线异物，位于第4胸推水平。诊断“支气管内金属异物”。次 Patient, male, 4 years old, attending pediatric medicine due to coughing in February. Chest through the discovery of “tracheal metal foreign body” and turn otolaryngology. Past no hemoptysis, breathing or difficulty swallowing history, history of inhalation or ingestion of foreign body unknown, physical examination: general developmental nutrition, heart, lung no abnormal findings. Chest workers, lateral flat radiograph shows oblate X-ray foreign body, located in the fourth chest push level. Diagnosis of “bronchial metal foreign body.” Times