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Figure 4a. Syphilitic aneurysm of the thoracic aorta. (a) DSA image shows aneurysmal involvement of the entire thoracic aorta. (b) CT scan obtained because the patient reported acute chest pain shows thickening of the aortic wall (arrowhead), which was not present at CT performed 2 weeks earlier. (c) Postprocedure CT scan shows a stent-graft inside the dilated aorta. (d) CT scan obtained at 1-year follow-up shows shrinkage of the aneurysmal space.
