title: Barium swallow as an aid to pre-operative assessment in patients with bronchogenic carcinoma.
mesh_terms: D001466:Barium Sulfate; D002283:Carcinoma, Bronchogenic / Q000000981:diagnostic imaging*; D004947:Esophagus / Q000000981:diagnostic imaging*; D005260:Female; D006801:Humans; D008175:Lung Neoplasms / Q000000981:diagnostic imaging*; D008297:Male; D008482:Mediastinum / Q000000981:diagnostic imaging; D008875:Middle Aged; D011300:Preoperative Care; D011859:Radiography
chemical_list: D001466:Barium Sulfate