- Etiology: barotrauma causing rupture of alveoli into interstitium, blunt thoracic trauma causing bronchus rupture, esophageal tear
- Imaging: continuous diaphragm sign, spinnaker sail sign of mediastinal air between thymus + heart, can dissect into neck / peritoneum / retroperitoneum, tracheobronchial injury can also have pneumothorax
Radiology Cases of Pneumomediastinum





