_:vb50950559 "url:https://www.ncbi.nlm.nih.gov/pubmed/21740740"^^ . _:vb50950559 . _:vb50950559 . _:vb50950559 . _:vb50950559 . _:vb50950559 . _:vb50950559 "An ovarian cancer that has_material_basis_in abnormally proliferating cells derives_from embryonic mesoderm."^^ .