Imaging Findings

(A) Computed tomography (CT) of the chest (lung windows) at the lung bases shows randomly distributed thin-walled cysts (arrows). There are scattered small centrilobular nodules, minimal ground-glass opacity, and mild bronchial wall thickening. (B) CT of the chest (coronal minimum-intensity projection) shows the distribution of the thin-walled cysts to advantage (arrows).

  Differential Diagnosis