unusual presentation of pulmonary hematoma after blunt chest wall trauma

a 25-year-old man was admitted in hospital due to right side hemopneumothorax secondary to car accident. a chest tube was inserted. during the hospitalization days, chest ct scan revealed a 3cmx3 cm oval-shaped density located in the right upper lobe. since he was in a good general condition, he was discharged from hospital after removal of chest tube and a follow-up chest ct-scan was recommended. in the chest ct scan that was performed 3 months later (figure 1), the oval-shaped density was increased in size. there was no endobronchial lesion in bronchoscopic evaluation. surgery was recommended he was underwent thoracotomy and the lesion was resected (figure 2). it was post-traumatic pulmonary hematoma (figure 3).