Suspected Brucella-associated descending thoracic aortic pseudoaneurysm presenting as upper gastrointestinal bleeding: A case report and review of literature

Figure 2 Axial contrast-enhanced computed tomography images of the descending thoracic aorta. A and B: Unenhanced axial computed tomography images at different levels showing a focal saccular pseudoaneurysmal lesion arising from the descending thoracic aorta, with irregular wall calcification and peripheral soft-tissue components; C and D: Contrast-enhanced axial computed tomography images at different levels showing contrast filling of the pseudoaneurysmal sac through an approximately 1.9-cm neck communicating with the aortic lumen. The peripheral non-enhancing low-attenuation components are compatible with mural thrombus or perianeurysmal inflammatory tissue.