_:vb50953981 . _:vb50953981 . _:vb50953981 "An ovarian benign neoplasm that is has_material_basis_in glandular and fibrous tissues, with a relatively large proportion of glands and is characterized by endometrial tissue."^^ . _:vb50953981 . _:vb50953981 . _:vb50953981 "url:https://www.ncbi.nlm.nih.gov/pubmed/9631607"^^ . _:vb50953981 .