Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A left - sided PICC terminates at the mid SVC . The heart size is normal . The hilar and mediastinal contours are within normal limits . There is no pneumothorax , focal consolidation , or pleural effusion . A previously seen left perihilar opacity is no longer present . Moderate degenerative changes are again seen throughout the thoracic spine .
    OUTPUT:
    
Previously seen left perihilar opacity is no longer visualized .