Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest were provided . There is a large left pneumothorax , increased from prior exam without signs of tension . The right lung is clear . Heart and mediastinal contour is stable . Bony structures are intact .
    OUTPUT:
    
Large left pneumothorax without signs of tension , increased in size dramatically from prior exam . Findings were posted and flagged to the ED dashboard at the time of this dictation .