CTICasesBilobed Bronchogenic Cyst
Imaging findings
Chest CT demonstrates a well-circumscribed, bilobed, fluid-attenuation mass measuring approximately 30 Hounsfield units in the middle mediastinum, extending directly into the adjacent lung parenchyma. Pathological examination of the resected mass confirmed a bronchogenic cyst, showing bronchial mucosa and cartilage within its fibrous wall.
Key takeaways
Bronchogenic cysts are congenital foregut duplication anomalies that typically arise in the subcarinal or paratracheal regions. They can sometimes exhibit high CT attenuation (over 20-30 HU) due to high protein or mucinous content, which can mimic a solid tumor. A bilobed appearance extending into the lung parenchyma is atypical and can make surgical resection more challenging due to close adherence to surrounding bronchovascular structures.
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