CTICasesAnterior Mediastinal Bronchogenic Cyst
Imaging findings
CT chest shows a dense, non-enhancing mass in the anterior mediastinum with a Hounsfield attenuation of 55-60. There is a dependency layer of hyperdense material representing milk of calcium. The mass remained stable over one year.
Key takeaways
Bronchogenic cysts are congenital foregut anomalies. Although typically located in the middle or posterior mediastinum, they can occur in the anterior mediastinum. High attenuation on CT from proteinaceous fluid and layering milk of calcium can mimic a thymoma, but lack of enhancement is key.
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