_:vb50953084 . _:vb50953084 "url:https://www.ncbi.nlm.nih.gov/pubmed/24520828"^^ . _:vb50953084 . _:vb50953084 . _:vb50953084 . _:vb50953084 "An ovary sarcoma that is a malignant vascular tumor that derives_from blood vessels."^^ . _:vb50953084 .