[Closed chest injuries and lung cysts in children]

Observations of 103 children with closed traumas of the chest have shown that traumatic pseudocysts of the lungs are not frequently encountered in this injury. They can result not only from rupture of the respiratory zone but also due to the valve mechanism in the transitory-conductive zone at the expense of the injury and lost elasticity of the bronchus wall. The traumatic pseudocysts require conservative treatment. Ruptures and strain of congenital cysts of the lungs in a closed trauma require urgent operations.