Where Does Mycotic Aneurysm Occur?

Mycotic aneurysms are generally found in the distal branches of the cerebral arteries and are usually caused by infectious endocarditis or aspergillosis. The most common organism causing mycotic aneurysms today is Staphylococcus aureus.

How common are mycotic aneurysms?

Mycotic aneurysm of the aorta accounts for 0.7% to 1.3% of all surgically treated aneurysms and its incidence in the aortic arch is less frequent. The prevalence of infected cerebral aneurysms is 0.7%-4% of all patients with cerebral aneurysms.

What is a mycotic aortic aneurysm?

A mycotic aortic aneurysm (MAA), synonymously known as infected aortic aneurysm, is an aortic aneurysm due to infection. Mycotic aortic aneurysm most commonly develops through microbial inoculation of the diseased aortic endothelium during bacteremia.