卵巢卵黄囊瘤(Yolk sac tumor)又名内胚窦瘤(endodermal sinus tumor)或卵黄囊间皮母细胞瘤(mesoblastoma vitellinum)。为起源于具有向体细胞分化或向滋养叶母细胞分化能力的多能细胞的一类肿瘤。这类肿瘤常见于女性儿童和青春期妇女。虽然比较少见,但其性质极恶,病人预后特差,已经引起临床、病理医生的重视而成为一个相当重要的问题。 Yolk sac tumor is also known as endodermal sinus tumor or mesoblastoma vitellinum. Is a type of tumor that originates from a pluripotent cell that has the ability to differentiate into somatic cells or to nourish leaf blast cells. Such tumors are common in female children and adolescent women. Although relatively rare, but its nature is extremely bad, poor prognosis of patients, has attracted the attention of clinicians, pathologists and become a very important issue.