卵巢卵黄囊瘤又称内胚窦瘤,比较少见。我科将近20年来经病理诊断的卵巢肿瘤,全部重新复查了病理切片,见有卵黄囊瘤12例,现分析总结如下。资料分析本组12例的年龄为9～36岁,平均20岁。发生部位、盆腔肿块、腹痛、伴腹水、继发肿瘤扭转详 Ovarian yolk sac tumor, also known as endodermal sinus tumor, is rare. All ovarian tumors diagnosed by pathology in our department in the past 20 years have completely reexamined the pathological sections. There are 12 yolk sac tumors. The analysis is summarized as follows. Data analysis The age of 12 patients in this group was 9 to 36 years old, with an average of 20 years old. Occurrence site, pelvic mass, abdominal pain, ascites, secondary tumor torsion