位于头颈部的畸胎瘤少见,目前已报告的也只有150例。本文报告了一例罕见的新生儿乳突部畸胎瘤。病例报告:患儿女婴,足月顺产无妊娠并发症。在其左耳区有一巨大多小叶囊性肿块,源于乳突部。婴儿Apgar公评分为9分,似无明显痛苦征。血常规化验正常。X线显示在肿块内有散在钙化点。起声波及CT扫描无大帮助,但可清楚显示 Teratoma located in the head and neck is rare, there are only 150 cases have been reported. This article reports a rare neonatal mastoid teratoma. Case report: Infant child infant, full-term pregnancy-free complications. In its left ear area has a large multi-lobular cystic mass, derived from the mastoid department. Baby Apgar rated 9 points, it seems no obvious signs of pain. Blood tests were normal. X-ray showed scattered calcification in the tumor. From the acoustic and CT scan no big help, but can be clearly displayed