Mycotic aneurysms of the pulmonary artery and aorta.

The clinical presentation and characteristic radiographic and angiographic findings in 6 patients with mycotic aneurysms of the pulmonary artery of aorta are presented. Radiographic findings that may suggest a mycotic aneurysm of the pulmonary artery include a rapid change in its coutour, which may be aneurysmal in character, and multiple septic pulmonary emboli or bacterial pneumonia. Patients with mycotic aneurysms of the descending thoracic aorta may have a middle or posterior mediastinal mass in close association with the aorta, and a pulmonary infiltrate may be seen surrounding the aneurysm. A barium swallow will often demonstrate esophageal displacement by the extrinsic mass.