Thoracic aortic dissection: Stanford type A
Status post stenting of the LAD with dissection flap extending from the aorta into the left main and down the left circumflex artery.
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There is a crescentic hyperdensity within the ascending thoracic aorta, likely representing a dissection flap containing previously administered IV contrast. The dissection flap measures approximately 3 mm along the posterior surface of the ascending aorta. There are calcifications along the aortic arch and descending aorta, probably representing atherosclerosis.