CTICasesAortic root pseudoaneurysm mimicking left atrium
Imaging findings
CT scan of a patient with a history of type A aortic dissection repair shows a massive pseudoaneurysm arising from the aortic root. The mass exerts severe compression on the left atrium and pulmonary arteries, presenting as a 'double left atrium sign'.
Key takeaways
Late pseudoaneurysms post-aortic dissection repair can grow very large and compress the adjacent left atrium. This can create a false 'double left atrium' appearance on imaging and cause inflow obstruction.
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