_:vb50954548 . _:vb50954548 "url:https://www.ncbi.nlm.nih.gov/pubmed/9949591"^^ . _:vb50954548 "url:https://www.ncbi.nlm.nih.gov/pubmed/8649322"^^ . _:vb50954548 . _:vb50954548 . _:vb50954548 . _:vb50954548 "An ovarian endodermal sinus tumor that presents in childhood."^^ . _:vb50954548 .