CTICasesBronchogenic cyst
Imaging findings
Contrast-enhanced chest CT shows a well-defined subcarinal mass conforming to the mediastinal structures, showing high attenuation mimicking a solid tumor. Non-contrast CT and PET CT confirm the mass is avascular and contains a dependent layering level of milk of calcium.
Key takeaways
Bronchogenic cysts are congenital foregut duplication cysts. Due to high proteinaceous or calcium content, they can have high attenuation values on CT and can mimic solid neoplasms or vascular structures. Differentiating features include a deformable shape conforming to adjacent structures, lack of enhancement, lack of FDG avidity on PET, and a layering milk of calcium level.
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