Inclusion Criteria:  Patient requiring the placement of the RELAY PLUS or RELAY NBS PLUS thoracic aortic stent-graft for the treatment of a pathology of their descending thoracic aorta. Patient (or legal representative for minor patients) who does not object (in writing or verbally) to the collection and transmission of their data.  Exclusion Criteria:  Patients for whom clinical follow-up is not possible, i.e. patients who are unable to return for follow-up visits (for example patients living abroad). Patient who earlier benefited from one or more thoracic stent-grafts and for whom a specific follow-up of the RELAY PLUS or RELAY NBS PLUS stent-graft would not be possible depending on the nature of their treatment (e.g. patient already treated with stent-graft in the descending and/or thoraco-abdominal aorta with several extensions) .