_:vb50949919 . _:vb50949919 . _:vb50949919 "A cell type cancer that has_material_basis_in abnormally proliferating cells derives_from two germinal layers of tissue."^^ . _:vb50949919 "url:http://medical-dictionary.thefreedictionary.com/mixed+neoplasm"^^ . _:vb50949919 . _:vb50949919 . _:vb50949919 .