_:vb50954641 . _:vb50954641 . _:vb50954641 "An ovarian benign neoplasm that is biphasic and has_material_basis_in epithelial and mesenchymal elements."^^ . _:vb50954641 . _:vb50954641 . _:vb50954641 "url:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3957347/"^^ . _:vb50954641 .