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In rare cases, pneumomediastinum may also arise as a result of blunt chest trauma (e.g. car accidents, fights, over pressure of breathing apparatus), while still evolving in the same fashion as the spontaneous form. [13] Pneumomediastinum is most commonly seen in otherwise healthy young male patients and may not be prefaced by a relevant ...
Hamman's syndrome, also known as Macklin's syndrome, is a syndrome of spontaneous subcutaneous emphysema [1] (air in the subcutaneous tissues of the skin) and pneumomediastinum (air in the mediastinum, the center of the chest cavity), sometimes associated with pain and, less commonly, dyspnea (difficulty breathing), dysphonia, and a low-grade fever.
Pneumomediastinum occurs due to the escape of air from ruptured alveoli or airways into the mediastinal space. The rupture of alveoli due to increased intrathoracic pressure (e.g., from coughing, vomiting, or trauma) leads to air tracking along the peribronchovascular interstitium which in turn accumulates in the mediastinum.
Once the pneumothorax or pneumomediastinum that causes the subcutaneous emphysema is resolved, with or without medical intervention, the subcutaneous emphysema will usually clear. [18] However, spontaneous subcutaneous emphysema can, in rare cases, progress to a life-threatening condition, [ 5 ] and subcutaneous emphysema due to mechanical ...
The continuous diaphragm sign is a radiological finding seen on chest X-rays that indicates the presence of gas within the thoracic cavity, specifically in the mediastinum (pneumomediastinum) [1], the peritoneal cavity (pneumoperitoneum) or pericardium (pneumopericardium) [2]. This sign is characterized by the uninterrupted visualization of the ...
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pneumomediastinum Hamman's sign (rarely, Hammond's sign [ 1 ] or Hammond's crunch [ 2 ] ) is a medical sign consisting of a crunching, rasping sound, synchronous with the heartbeat, [ 3 ] heard over the precordium in spontaneous mediastinal emphysema .
Sep. 27—Spontaneous combustion caused a fire at Pullman shopping center Monday morning. Pullman firefighters were able to contain the fire damage to one portion of the building, according to a ...