Spontaneous pneumomediastinum and subcutaneous emphysema in a child with unknown aetiology.

Spontaneous subcutaneous emphysema and pneumomediastinum in children without any predisposing factors is a rare entity. We present a case of an adolescent boy with spontaneous pneumomediastinum. He is a 14-year-old boy brought to the hospital with an odd feeling in the neck and chest. Initial chest X-ray revealed subcutaneous emphysema and pneumomediastinum. He was further evaluated with CT thorax and abdomen with contrast which revealed extensive pneumomediastinum with associated surgical emphysema in the chest wall and neck. Expert opinions from the cardiothoracic and respiratory teams were obtained. The child was discharged with safety netting and description of red flag signs. Repeat chest X-ray in 2 weeks showed complete resolution of the pneumomediastinum and subcutaneous emphysema. We will briefly discuss about the diagnosis and treatment of spontaneous pneumomediastinum and subcutaneous emphysema. © BMJ Publishing Group Limited 2019. No commercial re-use. See rights and permissions. Published by BMJ.