Sign
Air bronchograms
Branching air-filled bronchi seen as dark tubular shadows within opaque, airless lung on a chest radiograph.
Also called: Air bronchogram
- Found
- Seen on chest radiography as branching tubular lucencies within an area of opaque lung.
- Normal
- Not visible, because aerated bronchi do not contrast with aerated lung tissue.
- Abnormal
- Air-filled bronchi outlined against airless, opacified lung.
- Suggests
- Airspace disease; in a preterm infant, respiratory distress syndrome.