[Double x-ray of the esophagus, with special reference to its application to diagnosis and treatment of esophageal tumors].
D000368:Aged; D004938:Esophageal Neoplasms / Q000000981:diagnostic imaging*; D004947:Esophagus / Q000000981:diagnostic imaging*; D005260:Female; D006801:Humans; D008297:Male; D008722:Methods; D008875:Middle Aged; D011859:Radiography