Description
Enlargement of the mediastinum (an anatomical compartment located in the chest cavity between the lungs); "A widened mediastinum on chest radiograph in a previously healthy patient with evidence of overwhelming flulike illness is essentially pathognomonic of advanced inhalational anthrax and shold prompt immediate action. [Inglesby TV et al. Anthrax as a Biological Weapon. JAMA.1999;281:1735-1745]