Tracheal carcinoma.
D002294:Carcinoma, Squamous Cell / Q000000981:diagnostic imaging / Q000601:surgery*; D006801:Humans; D008297:Male; D008875:Middle Aged; D011859:Radiography; D014132:Trachea / Q000000981:diagnostic imaging; D014134:Tracheal Neoplasms / Q000000981:diagnostic imaging / Q000601:surgery*