Study index: 96-3 Vendor Picker Modality CT Examination CT: Spiral Angiography of the Thorax History 46-year-old male presented to the emergency room with parasternal and epigastric pain. A chest X-ray showed widening of the mediastinum. R/O thoracic aneurysm Findings There is an aneurysm of the entire thoracic aorta measuring up to 6.2 cm in diameter. Also, there is an intimal flap creating two lumens which is evident on all views extending from the aortic base through the ascending aorta, the aortic arch, and the descending aorta including that portion of the abdomen which is on the films. There are no pulmonary masses identified. The emergency room was immediately notified on this finding and a copy of the films were given to the emergency room so that they could accompany the patient. Aneurysm of thoracic aorta with dissection affecting ascending and descending aorta.