_:vb50953646 . _:vb50953646 . _:vb50953646 . _:vb50953646 . _:vb50953646 . _:vb50953646 "url:http://www.malacards.org/card/central_nervous_system_leiomyoma"^^ . _:vb50953646 "A central nervous system benign neoplasm that derives_from smooth muscle cells."^^ .