_:vb50937839 . _:vb50937839 . _:vb50937839 . _:vb50937839 "A parietal lobe neoplasm that has_material_basis_in cells lining the ventricles of the brain."^^ . _:vb50937839 . _:vb50937839 "url:http://www.cancer.gov/dictionary?CdrID=46432"^^ . _:vb50937839 . _:vb50937839 .