A 73-year-old man came with right hypochondriac pain since three years. He had developed breathlessness and chest pain since four months.
The frontal and lateral chest radiographs show an anteriorly placed, 6 cm. diameter soft tissue opacity in the left upper and middle zone. There is no calcification in this lesion. The left dome of the diaphragm is elevated. The left costophrenic angle is obscured. The CT aortogram shows a 8 x 9 x 9 cm saccular outpouching from the aortic arch. The aneurysm shows peripheral crescentic filling defect suggestive of thrombosis.