Click on the image for a larger view
The saccular aortic aneurysm of the proximal descending thoracic aorta is visible within the cardiac silhouette just below the aortic knuckle on the left border. It is partly overlapped by the main pulmonary artery shadow. The cardiac size is normal and so is the asecending aorta.
CT scan demonstrates the aneurysm very well. The wall of the aneurysm is partly calcified. The aneurysm measured about 5.5 cm and was saccular. There was a past history of major trauma several years back producing multiple fractures.