Typical appearance of bronchopulmonary dysplasia (BPD). Anteroposterior (AP) chest radiograph of a girl born at 25 weeks of gestation who is now post-menstrual age 36 weeks (11 weeks old) with severe BPD. The girl is still intubated and has a ductus arteriosus closure device. The lungs are characterized by overall hyperinflation, with mixed areas of density and hyperlucency characteristic of the AP chest radiograph appearance of severe BPD