畸胎瘤系原始三胚层演变而来的肿瘤。全身各器官均可发生,以中线器官较为多见,并有良性与恶性之分。恶性畸胎瘤既可为先天恶性,也可由良性恶变而来。现将我院1986年所检1例先天性骶尾部恶性畸胎瘤报告如下。病例摘要患者女,出生后40分钟死亡。其母25岁,第一胎足月顺产。既往史(-),分娩前曾拍X片检查,未发现胎儿骨骼有畸形。分娩时羊水量多,约2,700ml。胎儿娩出后发现骶尾部有一比婴儿头大的肿物,心跳、呼吸较弱。生后40分钟死亡。 Teratoma is a tumor that evolved from the original three germ layers. All organs of the whole body can occur. The middle line organs are more common and have benign and malignant points. Malignant teratoma can be either congenital malignancy or benign malignancy. One case of congenital sacrococcygeal teratoma examined in our hospital in 1986 is reported below. Case summary The patient female died 40 minutes after birth. Her mother is 25 years old and her first child is full-term. Past history (-), had X-ray examination before childbirth, did not find abnormal fetal bone. There is a lot of amniotic fluid during childbirth, about 2,700 ml. After the delivery of the baby, it was found that there was a larger mass than the baby’s head in the sacrococcygeal, and the heartbeat and breathing were weak. 40 minutes after birth died.