- Mycotic Aneurysms occur due to bacterial infection within the vascular wall and are fairly rare. The inflammation associated with the infectious process results in weakening of the vascular wall and thus its aneurysmal dilation.
- Direct Infection
- Embolic Infection
- In rare cases, embolization of contaminated particles from vegetations of infective endocarditis can lodge in the vaso vasorum of large arteries and lead to infection of the vascular wall. When this does occur, such mycotic aneurysms frequently involve the cerebral arteries.