title: Radiographic marker as an aid in evaluation of neck masses.
mesh_terms: D001466:Barium Sulfate; D006258:Head and Neck Neoplasms / Q000000981:diagnostic imaging; D006801:Humans; D012796:Sialography / Q000379:methods*; D013363:Submandibular Gland / Q000000981:diagnostic imaging*
chemical_list: D001466:Barium Sulfate