Inflammatory aneurysm of the thoracoabdominal aorta with associated dissection.

The inflammatory variant of aortic aneurysms has 3 unique features: marked thickening of the aneurysm wall, fibrosis of the adjacent retroperitoneum, and rigid adherence of the adjacent structures to the anterior aneurysm wall. Abdominal tenderness with or without a pulsatile abdominal mass is the most common finding, although it is present in only about 33% of patients. Systemic symptoms, such as fever, malaise, and weight loss, are reported in about 20% to 50% of patients.