卵巢内胚窦瘤又名卵黄囊瘤 ,好发于幼女及青年妇女 ,它是一种多见的卵巢肿瘤 ,预后差[1] 。我们诊治 1例 ,随访 30余年 ,无瘤生存 ,报告如下。1　病例报告患者 ,14岁 ,未婚。腹部包块 5 0余天 ,明显增大 10天 ,于196 6年 3月 8日入院。入院检查腹部膨隆如足月妊娠 ,左下腹触及 Ovarian endodermal sinus tumor, also known as yolk sac tumor, occurs in young girls and young women, it is a common ovarian tumor, the prognosis is poor [1]. We treated 1 case, followed up more than 30 years, free of disease, the report is as follows. 1 case report patient, 14 years old, unmarried. Abdominal mass 50 days, significantly increased 10 days, on March 8, 1996 admission. Admission abdominal bulging, such as full-term pregnancy, lower left touch