Study on x-ray findings of early oesophageal cancer.
D000368:Aged; D004938:Esophageal Neoplasms / Q000175:diagnosis / Q000000981:diagnostic imaging* / Q000401:mortality / Q000473:pathology / Q000601:surgery; D004945:Esophagoscopy; D004947:Esophagus / Q000473:pathology; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011859:Radiography