CTICasesE. Coli Mycotic Aortic Aneurysm
Imaging findings
CT angiography shows a rapidly growing, lobulated pseudoaneurysm of the descending thoracic aorta associated with eccentric wall thickening and multiple gas bubbles within the aortic wall. Blood cultures grew E. coli.
Key takeaways
Mycotic aortic aneurysm is a bacterial infection of the aortic wall, commonly due to Salmonella, Staph, or E. coli. The presence of gas within the aortic wall is a highly specific, critical sign of active, gas-producing infection (aortitis) and carries a high risk of rupture.
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