Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . The patient is status post left upper lobectomy with significant volume loss again seen on the left with suggestion of interval increase in volume loss as compared to the prior study . No definite pleural effusion is seen . In the visualized left lower lung field , there is a patchy opacity likely present on the prior study and most likely relates to underlying volume loss , although a superimposed infection is not entirely excluded . The right lung is clear . There is no pleural effusion or pneumothorax . Cardiac and mediastinal silhouettes are grossly stable . Surgical clips in the upper quadrant are from presumed prior cholecystectomy .
    OUTPUT:
    
Status post left upper lobectomy with left - sided volume loss which is increased as compared to the prior study .