Diffuse Subcutaneous Emphysema and Pneumomediastinum Seconda
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Pneumomediastinum and subcutaneous emphysema are often a result of spontaneous alveolar wall rupture or, more rarely, of disruption of the upper airways or gastrointestinal tract and are related to the presence of air within the mediastinal cavity or in the subcutaneous tissue, respectively.The clinical symptoms of mediastinal and/or subcutaneous emphysema critically depend on the amount of extravasated gas and the degree of extension of the affected areas. Most frequently, they include swelling and crepitus over the involved anatomical site, as well as chest pain, dyspnoea, and dysphagia.We present the case of a patient with pneumomediastinum and diffuse subcutaneous emphysema, involving the neck, shoulder, and lateral chest wall following traumatic rib fracture secondary to a minor blunt chest trauma........

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5368373/
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