[The clinical investigation of retrograde azygography in esophageal cancer (author's transl)].
D000328:Adult; D000368:Aged; D001401:Azygos Vein / Q000000981:diagnostic imaging*; D004938:Esophageal Neoplasms / Q000000981:diagnostic imaging* / Q000628:therapy; D006801:Humans; D008722:Methods; D008875:Middle Aged; D011859:Radiography