Pneumomediastinum Complicating Diabetic Ketoacidosis and Boerhaave's Syndrome.

An 18-year-old man presented with altered mental status. He was found to have diabetic ketoacidosis. Chest X-ray showed pneumomediastinum. After intubation for air-way protection, an oral-gastric tube was placed. A chest computed tomography scan showed the tip of the oral-gastric tube to be in the right hemithorax. The patient underwent a thoracotomy and was managed in the intensive care unit. Both diabetic ketoacidosis and Boerhaave's syndrome should be considered as possible causes of pneumomediastinum in a patient with similar presentation. Boerhaave's syndrome should be ruled out prior to the insertion of an oral-gastric tube to avoid further morbidities.