Introduction
Pneumopericardium, the presence of air in the pericardial cavity, is a rare entity in adults that is typically described as a result of chest trauma or iatrogenic complication of an invasive procedure. We present a case of non-iatrogenic pneumopericardium manifesting after pericardiocentesis, resulting from an underlying fistulous communication between the distal trachea and pericardial cavity, as a complication of a malignant glomus tumor of the trachea.