Brachiocephalic trunk pseudoaneurysm
Mediastinal hematoma may be seen in blunt trauma, such as deceleration injuries. A widened mediastinum on CXR should raise concern for a vascular injury, particularly a traumatic aortic injury. Other causes include small vessel injury, fractures of the sternum and vertebral column.
Mediastinal hematoma may potentially lead to extrapericardial cardiac tamponade.
Pseudoaneurym of the brachiocephalic trunk is a rare finding. In this case, the small pseudoaneurysm was managed conservatively.