卵黄囊瘤(YOLK Sac tumor)又称内胚窦瘤(Endodermal sinus tumor)。认为是由卵黄囊发生恶性程度很高的生殖细胞肿瘤。主要见于性腺。还见于骶尾、盆腔、腹后壁、纵膈、阔韧带、阴道、外阴、子宫颈、胃底、腹壁脐处及松果体等。现综述如下:病理形态 Yolk Sac tumor is also called Endodermal sinus tumor. It is considered to be a germ cell tumor which is highly malignant by the yolk sac. Mainly seen in the gonads. Also found in the sacrococcygeal, pelvic, ventral posterior wall, mediastinum, broad ligament, vagina, vulva, cervix, stomach fundus, abdominal wall umbilical and pineal and so on. Are summarized as follows: pathological morphology