CTICasesThymoma (Assessed with Retrospectively Gated CT)
Imaging findings
Chest CT demonstrates a lobulated, vascular anterior mediastinal mass in a seventy-year-old patient, highly characteristic of a thymoma. On retrospectively gated CT with cinematic rendering, the mass is shown smoothly sliding across the pericardium during cardiac contraction without any restriction, indicating a lack of adhesion or direct invasion.
Key takeaways
While cardiac MRI is traditionally used to evaluate tumor invasion of the pericardium or cardiac chambers, retrospectively gated CT offers a highly effective alternative. Dynamic assessment showing the mass sliding freely across the pericardium during cardiac cycles can reliably exclude tight adhesion or direct invasion, providing valuable reassurance to the surgical team.
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