Chest radiograph and computed tomography of pneumothorax due to Birt-Hogg-Dubé syndrome

(A) Chest radiograph of a 49-year-old female shows left pneumothorax (arrows) and multiple bilateral cystic lesions involving mainly the lower lung zones.

(B) Coronal reformation of chest CT performed 4 hours later demonstrates large left and small right (arrowheads) pneumothoraces and multiple bilateral cysts of various sizes including a large cyst at the right lung base (thick arrows). The patient was subsequently diagnosed as having Birt-Hogg-Dubé syndrome.