Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP view of the chest . Median sternotomy wires and mediastinal clips are stable . The left - sided pigtail catheter has been removed . Two chest tubes have been placed in the left hemithorax . There is a persistent left basilar pneumothorax ; however , it is decrease in size . Adjacent left lower lobe opacity either representing atelectasis or pneumonia is unchanged . Diffuse interstitial opacities are again seen , which could represent a combination of interstitial pulmonary edema or possibly atypical pneumonia . No right - sided pleural effusion or focal consolidation .
    OUTPUT:
    
Slight decrease in left basilar pneumothorax and left pleural effusion . Mild interstitial opacities may indicate mild pulmonary edema versus atypical infection . Persistent left lower lobe opacity either representing atelectasis or pneumonia is unchanged .