_:vb50953759 . _:vb50953759 . _:vb50953759 . _:vb50953759 "An ovary sarcoma that arises from smooth muscle progenitors."^^ . _:vb50953759 "url:https://www.ncbi.nlm.nih.gov/pubmed/22873115"^^ . _:vb50953759 . _:vb50953759 .