Abstract
Yolk sac tumor called endodermal sinus tumor, is a rare and very malignant germ cell tumor. The second largest ovarian germ cell tumor after dysgerminoma, with an incidence of 1% of ovarian malignancies. Tumors usually appear as fast-growing masses in young women. The radiological imaging of this tumor is seen as a large dense cystic mass with heterogeneous enhancement, a component of dilated intratumoralblood vessels accompanied by an intralesional hemorrhagic focus. The best radiological modality is CT scan or MRI. CT imaging useful for distinguishing yolk sac tumors from other ovarian tumors. In this article was reported a case of ovarial york sac tumor in 7 years old girl. USGand CT scan examination showed solid with cystic mass in the pelvic cavity. Histologically was malignant germ cell as york sac tumor.
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