Physician-Sponsored IDE for the Talent Endoluminal Stent Graft System for the Treatment of Thoracic Lesions

Inclusion Criteria: Subjects who participate in this study as study patients must fulfill the following criteria: * Subject is \> 18 years of age. * Subject is not pregnant or lactating. Females of child-bearing potential must practice a reliable method of contraception. * Subject is diagnosed with one of the following conditions of the descending thoracic aorta. All conditions must be verified by diagnostic imaging \[ultrasonography, computed tomography (CT), magnetic resonance imaging (MRI) or angiography\]. * A true (i.e., atherosclerotic) supraceliac aneurysm (fusiform or saccular type) with or without a co-existing aortic dissection or penetrating aortic ulcer * Aortic dissection of DeBakey Type I or II (Stanford A, proximal) in the absence of an aneurysm; OR * Penetrating aortic ulcer in the absence of an aneurysm; OR * Traumatic transection; OR * Pseudoaneurysm - traumatic or degenerative (i.e., one that does not involve all layers of the vessel and is not atherosclerotic in origin). * Subject's anatomy is suitable for placement of the Medtronic/Talent Stent-Graft, with a distinct proximal aneurysm neck of 10 mm or more in length and a distal aneurysm neck of at least 10 mm. * Subject has a TAA that is dilated to \> 5 cm in diameter, \> 1.5 times the diameter of the adjacent native/non-aneurysmal aorta, or is symptomatic. * Subject has a proximal and distal aortic neck diameter \> 18 mm and \< 42 mm. * Subject has an arterial access site, either peripheral…