Aortic Dissection

Imaging

Prominent cardiomediastinal silhouette, which may be due to patient position.

Prominent cardiomediastinal silhouette, which may be due to patient position.

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CT Angiography Aorta

Highly complex type B aortic dissection originating at the distal arch (just distal to the left subclavian artery) and terminating at the level of diaphragm. The dissection contains multiple false lumens containing blood products of differing ages (thrombus and contrast-opacified blood). No apparent involvement of the left common carotid or left subclavian artery.

Mediastinum Anatomy

Mediastinal Masses

Anterior
Retrosternal goiter
Thymoma
Germ-cell tumor
Lymphadenopathy (lymphoma)
Middle
Aortic arch aneurysm
Dilated pulmonary artery
Tracheal lesion
Posterior
Esophageal lesions
Hiatal hernia
Descending aortic aneurysm
Paraspinal abscess

References:

  1. Faiz, O., & Moffat, D. (2002). Anatomy at a glance. Malden, MA: Blackwell Science.
  2. Whitten CR, Khan S, Munneke GJ, Grubnic S. A diagnostic approach to mediastinal abnormalities. Radiographics. 2007;27(3):657–671. doi:10.1148/rg.273065136.
  3. WikEM: Widened mediastinum