We report an autopsy case of bronchial asthma patient with a specific abdominal aortic aneurysm. The aneurysm did not show arteriosclerosis, and a specific saccular morphology was noted above the bifurcation. Histologically, necrosis of the media resembling acute aortic dissociation was observed. However, angiitis was ruled out. In addition, the aneurysm showed a cicatrized, old intimal crack in addition to the rupture site, suggesting repeated failures. The long-term steroid therapy-related fragility of the arterial wall may have been involved in the etiology of the aneurysm.
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