Massive Self-Induced Subcutaneous Cervicofacial, Pneumomediastinum, and Pneumopericardium Emphysema Sequelae to a Nondisplaced Maxillary Wall Fracture: A Case Report and Literature Review.

Iatrogenic cervicofacial subcutaneous emphysema is a well-reported entity in the field of dentistry and oral and maxillofacial surgery, especially with the use of air-driven headpieces. Cervicofacial subcutaneous emphysema sequelae after maxillofacial trauma, however, has been reported less and the self-induced variant is even rarer. We report a case of massive cervicofacial subcutaneous emphysema, pneumomediastinum, and pneumopericardium in a healthy 16-year-old boy after blunt trauma to the face, which caused a nondisplaced anterior maxillary wall fracture. The findings from the present case report will validate the common phrase "no nose blowing or holding your sneezes" that clinicians tell patients after maxillofacial trauma and sinus surgery.