[Retrograde azygography].
D000368:Aged; D001401:Azygos Vein / Q000000981:diagnostic imaging*; D002404:Catheterization; D006801:Humans; D008297:Male; D008722:Methods; D008875:Middle Aged; D011859:Radiography; D013899:Thoracic Neoplasms / Q000000981:diagnostic imaging