Synonyms: widened mediastinum

Conditions associated with mediastinal widening:

  • Rupture of aorta or brachiocephalic arteries
  • Rupture of esophagus
  • Rupture of thoracic duct
  • Aortic aneurysm
  • Aortic dissection
  • Hilar lymphadenopathy
  • Mediastinal mass
  • Mediastinitis
  • Pericardial effusion
  • Venous hemorrhage (e.g., trauma or malpositioning of central venous line)
  • Venous congestion associated with congestive heart failure
  • Atelectasis abutting the mediastinum
  • Magnification and geometric distortion on supine radiograph