卵巢内胚窦瘤又称卵黄囊瘤,是一种罕见的由胚外结构-卵黄囊发生的高度恶性的生殖细胞肿瘤,患者多为年青妇女,能存活五年以上者极为罕见。北京房山县医院和石化职工医院建院以来仅见的两例均幸存至今,一例已存活近8年,另一例已存活6年余,且已生育,故予以报道。 Ovarian endoderm sinus aneurysm, also known as yolk sac tumor, is a rare and highly malignant germ cell tumor that occurs from extraembryonic structures - yolk sac. Most patients are young women, and those who survive for more than five years are extremely rare. Two cases that have only survived since the establishment of the Beijing Fangshan County Hospital and the Petrochemical Workers’ Hospital have survived, and one case has survived for nearly 8 years. The other case has survived for more than 6 years and has been fertile. Therefore, it was reported.