Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Patient is status post left upper lobectomy . There is decreased aeration of the left lung as compared to the prior study overall , there are low lung volumes , although same groin along appears grossly clear . No evidence of pneumothorax is seen . The cardiac and mediastinal silhouettes are grossly stable . Right - sided poor distal tip not well assessed , but likely terminating in the cavoatrial junction . Anchor screw projects over the right humeral head .
    OUTPUT:
    
Low lung volumes . Status post left upper lobectomy with decreased aeration of the left lung as compared to prior .