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Pneumomediastinum 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). Pneumomediastinum may also present with symptoms mimicking cardiac tamponade as a result of the increased ...
The double bronchial wall sign is best visualized on CT, which provides high-resolution images of the mediastinal structures. The double bronchial wall sign is commonly seen in the central bronchi, particularly in the trachea or mainstem bronchi, where air is more likely to outline the structures.
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 ...
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.
On a chest X-ray, the sail sign is a radiologic sign that suggests left lower lobe collapse. [1] In children, however, a sail sign could be normal, reflecting the shadow of the thymus.
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.
The mediastinum (from Medieval Latin: mediastinus, lit. 'midway'; [2] pl.: mediastina) is the central compartment of the thoracic cavity.Surrounded by loose connective tissue, it is a region that contains vital organs and structures within the thorax, namely the heart and its vessels, the esophagus, the trachea, the vagus, phrenic and cardiac nerves, the thoracic duct, the thymus and the lymph ...
1935 map of Shanghai at Shanghai International Settlement, by the Army Map Service Map of the Exposition Universelle of 1900 , by GTC Map of Brazil in the Miller Atlas , by Pedro Reinel , Lopo Homem , Jorge Reinel and António de Holanda