_:vb50952781 "A malignant ovarian surface epithelial-stromal neoplasm that has_material_basis_in the surface epithelium of the ovary."^^ . _:vb50952781 . _:vb50952781 "url:https://ncit.nci.nih.gov/ncitbrowser/ConceptReport.jsp?dictionary=NCI_Thesaurus&version=16.12d&ns=NCI_Thesaurus&code=C40026"^^ . _:vb50952781 . _:vb50952781 . _:vb50952781 . _:vb50952781 .