Figure 1b. Incomplete rupture of the descending aorta in a 51-year-old man with blunt thoracic trauma from a traffic accident. (a, b) Axial CT image (a) and oblique sagittal reformatted image (b) show a saccular outpouching of the descending aorta. The outpouching is demarcated from the aortic lumen by a collar (arrowheads), and there is only a small periaortic hematoma. The nasogastric tube is not deviated. (c) Sagittal volume rendered image shows the pseudoaneurysm more clearly. (d) Left anterior oblique angiogram shows endovascular repair of the aneurysm. (e) Left anterior oblique angiogram shows that the repair was successful, with preservation of all supraaortic vessels.