Rapid enlargement of the azygos vein as a sign of retroperitoneal venous obstruction.
D000368:Aged; D001401:Azygos Vein / Q000000981:diagnostic imaging*; D003097:Collateral Circulation; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D007084:Iliac Vein; D010690:Phlebography; D013902:Radiography, Thoracic; D012187:Retroperitoneal Space; D014648:Varicose Veins / Q000209:etiology; D014652:Vascular Diseases / Q000000981:diagnostic imaging*; D014682:Vena Cava, Inferior