title: Plain film of the abdomen as starting point in diagnosis of gastric masses.
mesh_terms: D000368:Aged; D003287:Contrast Media; D005188:False Negative Reactions; D005260:Female; D006801:Humans; D008722:Methods; D010781:Photography / Q000295:instrumentation; D011860:Radiography, Abdominal; D013274:Stomach Neoplasms / Q000000981:diagnostic imaging*
chemical_list: D003287:Contrast Media