Left upper lobe atelectasis in a child with cystic fibrosis

Chest radiographs of an 8-year-old female with cystic fibrosis, recent wheezing, increased cough and secretions, and diminished breath sounds in left upper lobe. Upright frontal radiograph reveals relatively increased opacity of the left lung and indistinctness of the left mediastinal border. The lateral view shows anterior displacement of the major fissure caused by left upper lobe atelectasis.