内胚窦瘤为生殖细胞瘤的一种类型,起源于卵黄囊的内胚层故也称卵黄囊瘤。而原发于纵隔者实属少见。1967年由Teilmann等(1)首次报告,累计到1980年国外报告22例(2,5),国内尚末见报告,我院收治一例报告如下: 男,23岁。住院号:58012。1983年8月25日无何诱因自感左胸嘲、胸闷、轻度呼吸困难。翌日去当地医院胸透 Endodermal sinus tumor is a type of germ cell tumor, originated in the yolk sac endoderm also called yolk sac tumor. The origin in the mediastinum is rare. In 1967, Teilmann et al. (1) reported for the first time that there were 22 foreign reports (2,5) accumulated in 1980. No reports were reported domestically. One case was admitted to our hospital as follows: Male, 23 years old. Inpatient number: 58012. August 25, 1983 without any inducement left chest ridicule, chest tightness, mild breathing difficulties. Chest to the local hospital the next day