CTICasesPerigraft Fluid Collection Indenting the Right Pulmonary Arterial Wall
Imaging findings
CT and sagittal reformats show a perigraft fluid collection surrounding an ascending aortic graft that causes a conspicuous extrinsic filling defect and indentation along the wall of the right pulmonary artery.
Key takeaways
Perigraft fluid collections or chronic pseudoaneurysms can compress adjacent structures such as the right pulmonary artery due to their shared adventitia. Magnetic resonance angiography is highly useful in differentiating a simple non-enhancing collection from active vascular communication or pseudoaneurysm erosion.
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