CTICasesWater-Attenuation Bronchogenic Cyst
Imaging findings
Chest CT shows a well-circumscribed, homogeneous middle mediastinal/subcarinal mass with water attenuation (-7 Hounsfield units), consistent with a bronchogenic cyst.
Key takeaways
Bronchogenic cysts are congenital foregut anomalies. Although they typically have high attenuation due to proteinaceous/mucinous fluid, they can occasionally present with pure water attenuation.
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