Study of the Thoraflex™ Hybrid Device for the Treatment of Aneurysm/Dissection of the Descending Thoracic Aorta

Inclusion Criteria: • Patient presenting an aneurysm/dissection of the thoracic aorta of the aortic arch and/or the descending thoracic aorta, and necessitating a procedure of the "Elephant Trunk" type, with the Thoraflex™ Hybrid hybrid vascular prosthesis. Exclusion Criteria: * Patient having refused to sign the Consent form to the use of his/her data. * Patient residing abroad, for whom follow-up is not possible. * Patient with active endocarditis * Patient who has received a post-infarction septal repair. * A list of all of the patients who have received the Thoraflex™ Hybrid hybrid vascular prosthesis but not participating in the observational study will be documented, as well as the reasons for non-inclusion