[Pneumomediastinum in a child].

BACKGROUND

Pneumomediastinum is a rare, benign condition in which air leaks through the alveolar membrane and collects in the mediastinum. Typical clinical symptoms include chest pain and dyspnoea. In the absence of underlying pathology, conservative treatment is sufficient for remission. Complications are infrequent.

CASE DESCRIPTION

We present a case of a 14-year-old boy with pneumomediastinum arising during physical exercise after an earlier episode of coughing. Physical examination showed subcutaneous emphysema in the neck and praecordial systolic crepitations. A chest X-ray revealed air in the mediastinum. Conservative treatment was sufficient for full clinical and radiographic recovery.

CONCLUSION

There was no underlying pathology. The diagnosis was therefore a 'spontaneous pneumomediastinum' possibly caused by a Valsalva manoeuvre after physical exercise and chronic coughing.