Traumatic pulmonary pseudocyst due to thoracic trauma.

Traumatic pulmonary pseudocyst is uncommon and usually regresses spontaneously with conservative treatment. In rare cases, surgical intervention may be necessary. A pseudocyst may be treated surgically to prevent potential complications if the patient undergoes a thoracotomy for another reason. We present a patient with hemopneumothorax and traumatic pulmonary pseudocyst after a motor vehicle accident, who was operated on electively due to massive air leak.