绒毛膜上皮癌和恶性畸胎瘤均属胚生殖细胞肿瘤。男性绒毛膜上皮癌原发于松果体区极为罕见,据国内文献报告只有4例[1,2];原发于脊髓内胚生殖细胞瘤更为罕见,国内外文献只见3例报告,其中年龄最小为5岁[3,4]。本文报告2例中枢神经系统罕见胚生殖细胞瘤。　　例1　男,17岁,双眼复视 Choriocarcinoma and malignant teratoma are embryonic germ cell tumors. Male choriocarcinoma primary in the pineal region is extremely rare, according to the domestic literature reported only 4 cases [1,2]; primary in the spinal cord embryo germ cell tumor is more rare, only three cases of domestic and foreign literature reports, The youngest is 5 years old [3,4]. This article reports 2 cases of rare germ cell tumors of the central nervous system. Example 1 male, 17 years old, binocular diplopia