Introduction:

Pneumomediastinum is defined as the presence of air in the mediastinal cavity. This is a rare disease caused by surgical procedures, trauma or spontaneous scape of air from the lungs; asthma is a frequently associated factor. It has extensive differential diagnoses due to its symptoms and clinical signs.

Case presentation:

A 17-year-old female patient presented with respiratory symptoms for 2 days, dyspnea, chest pain radiated to the neck and shoulders, right supraclavicular subcutaneous emphysema, wheezing in both lung fields, tachycardia and tachypnea. On admission, laboratory tests revealed leukocytosis and neutrophilia, and chest X-ray showed subcutaneous emphysema in the right supraclavicular region. Diagnosis of pneumomediastinum was confirmed through a CT scan of the chest. The patient was admitted for treatment with satisfactory evolution.

Discussion:

Pneumomediastinum occurs mainly in young patients with asthma, and is associated with its exacerbation. This condition can cause other complications such as pneumopericardium, as in this case. The course of the disease is usually benign and has a good prognosis.

Conclusion:

Because of its presentation, pneumomediastinum requires clinical suspicion to guide the diagnosis and treatment. In this context, imaging is fundamental.

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