_:vb50955448 "url:https://www.ncbi.nlm.nih.gov/pubmed/20090265"^^ . _:vb50955448 . _:vb50955448 . _:vb50955448 "An ovarian primitive germ cell tumor that has_material_basis_in trophoblastic cells and develops in the absence of a preceding gestational event."^^ . _:vb50955448 . _:vb50955448 . _:vb50955448 .