卵黄囊瘤又称内胚窦瘤,多见于儿童和青年妇女,病情凶险,致死率极高,由于它相对的罕见和人们对此瘤认识较晚。本文对50例病人进行临床分析。 Yolk sac tumor, also known as endodermal sinus tumor, is more common in children and young women. The condition is dangerous and the mortality rate is extremely high. Because it is relatively rare and people know the tumor later. This article presents a clinical analysis of 50 patients.