Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left pectoral pacemaker and its leads are in unchanged positions . The small left apical pneumothorax measures approximately ___ mm , which is larger than before ( previously ___ mm ) . There is no consolidation or large pleural effusion . Cardiomediastinal silhouette is normal size .
    OUTPUT:
    
Small left apical pneumothorax is larger than 5 hr ago .