Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . There is a large right pneumothorax . No significant mediastinal shift is seen . There is some flattening of the right hemidiaphragm . There is blunting of the posterior right costophrenic angle which may be due to a small pleural effusion . There is some atelectasis in the collapsed right lung . The left lung is clear . No left - sided pneumothorax is seen . Partially imaged is a VP shunt projecting over the right chest , inferior aspect not well seen . The cardiac and mediastinal silhouettes are unremarkable .
    OUTPUT:
    
Large right pneumothorax , no significant mediastinal shift but one image demonstrates flattening of the right hemidiaphragm and thus underlying mild tension is not excluded . Possible trace right pleural effusion . Subsequent chest radiograph demonstrates right chest pigtail catheter in place with reexpansion of the right lung and significant decrease in size in the right pneumothorax , thus the ED was aware .