objective: to explore ct image of yolk sac tumor out of gonad.
目的:探讨ct在性腺外卵黄囊瘤的临床应用价值。
conclusionatra could inhibit proliferation of yolk sac tumor cell line, and down regulation of vegf could be the inhibitory mechanism of atra on yolk sac tumor cell line in vitro.
结论全反式维甲酸可以抑制睪丸卵黄囊瘤细胞的增殖,抑制肿瘤增殖机制可能与下调vegf的表达有关。
objective:malignant germ cell tumors occur in childhood at a rate of 2 to 3 cases per million children, and yolk sac tumor accounts for the most(62.7%) of malignant germ cell tumors.