Fig. 10
From: Imaging of congenital lung diseases presenting in the adulthood: a pictorial review
Bronchogenic cysts showing air-fluid and fluid–fluid levels. Axial CT image in lung window in a patient shows air-fluid level within the bronchogenic cyst (a). In another patient, air-fluid level and also milk of calcium can be seen within the bronchogenic cyst on axial CT images in lung (b, arrow) and mediastinal windows (c, arrow). Axial CT image in mediastinal window in another patient shows a bronchogenic cyst (d, white arrow). Fat suppressed T2 weighted (e, white arrow) and post-contrast T1 weighted (f, white arrow) MR images demonstrate the fluid-fluid level within the cyst. The red arrows show the ectopic thyroid nodule (d–f)