Airway Foreign Body

  • Etiology: most common is peanut, peanut bad because protein incites vicious foreign body reaction, causes ball valve effect
  • Imaging: 95% radiolucent, 33% of inspiratory CXR are normal, lack of change in lung volume / asymmetrical air trapping – affected lung does not deflate in expiration or when placed down on decubitus, mediastinum swings towards affected side on inspiration (rocker heart)

Cases of Airway Foreign Body

CXR of airway foreign body
CXR taken in inspiration (above) shows symmetrical aeration of the lungs. CXR taken in expiration (below) shows air trapping in the right lung.
Radiograph of airway foreign body
Lateral radiograph of the airway shows a subglottic soft tissue mass. Endoscopy showed a sunflower seed surrounded by granulation tissue.