Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Interval placement of a left thoracostomy drain with tip in the left lung base . No radiographically evident pneumothorax is visualized on this supine radiograph . Known manubrial and rib fractures are poorly visualized . Retrocardiac opacity may be due to residual pleural effusion / hemothorax and adjacent atelectasis . Cardiomegaly , as before . There is a left chest pacemaker with electrodes in expected positions . Aorta is calcified , indicating atherosclerosis . There asymmetric fullness of the right neck , compared to the left , consistent with known hematoma . Again seen are changes compatible with Paget 's disease in the right humerus .
    OUTPUT:
    
Interval placement of a left thoracostomy drain with tip in the left lung base . No radiographically evident pneumothorax is visualized on this supine radiograph . Known manubrial and rib fractures are poorly visualized . There is asymmetric fullness of the right neck , compared to the left , consistent with known hematoma .