The main symptom is usually severe central chest pain. Other symptoms include laboured breathing, voice distortion (as with helium) and subcutaneous emphysema, specifically affecting the face, neck, and chest.<unk>  can also be characterized by the shortness of breath that is typical of a respiratory system problem. It is often recognized on auscultation by a "crunching" sound timed with the cardiac cycle (Hamman's crunch).<unk>  may also present with symptoms mimicking cardiac tamponade as a result of the increased intrapulmonary pressure on venous flow to the heart.
Pneumomediastinum
Hemothorax
Chylothorax
Urinothorax
Hydropneumothorax
Pneumopericardium
Hemopneumothorax
Pulmonary hematoma