<unk>  occurs when sudden and blunt chest trauma forces  retrograde flow of blood  through the superior vena cava and into the neck and head.
Normally a result of blunt chest trauma from an MVA 
In children the chest wall is more pliable and there is often less morbidity unless there is also multiorgan trauma
Traumatic asphyxia
Airway/Pulmonary
Neonatal abstinence syndrome
Bronchial injury
Blast injury
Diaphragmatic trauma
Abusive head trauma
Hemothorax