Progression of infection in native aorta and stent-graft. a. Angiogram on hospital day #2 demonstrating pseudoaneurysm of the descending thoracic aorta. b. 3D Angiography s/p placement of Gore TAG device (15 cm × 28 mm) over pseudoaneurysm of descending thoracic aorta. c. Chest CT scan demonstrating a large periaortic abscess around the region of the endograft measuring 8.2 cm × 8.8 cm × 8.2 cm.