Azygos vein enlargment on the chest film.
D001401:Azygos Vein / Q000033:anatomy & histology / Q000000981:diagnostic imaging*; D004106:Dilatation; D006801:Humans; D008297:Male; D008875:Middle Aged; D011169:Portal Vein; D011187:Posture; D013902:Radiography, Thoracic; D013162:Splenic Vein; D013924:Thrombophlebitis / Q000150:complications / Q000000981:diagnostic imaging; D014684:Venae Cavae