睾丸内胚窦瘤是一种较罕见的来源于生殖细胞的非精原细胞瘤 ,其恶性程度较高 ,大多预后不良。我院自 1992年以来共收治睾丸肿瘤 4 2例 ,其中睾丸内胚窦瘤 4例 (占 9.5% ) ,现报告如下 :临床资料例 1　男性 ,52岁。因右侧睾丸肿大并酸胀不适 4月入院 ,无阴囊外伤史。查体 :右侧 Testicular endodermal sinus tumor is a relatively rare germ cell derived non-seminoma, the higher the degree of malignancy, most of the prognosis is poor. A total of 42 cases of testicular tumors have been treated in our hospital since 1992, including 4 cases of testicular endodermal sinus tumors (9.5%). The report is as follows: Clinical data 1 male, 52 years old. Due to the right side of the testicular swelling and soreness discomfort in April admission, no history of scrotal injury. Physical examination: the right