Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is new complete opacification of the left hemithorax , concerning for complete left lung collapse . The right lung is clear . Surgical hardware projects over the lower cervical spine / upper thoracic spine . A left - sided PICC line projects over the lower SVC .
    OUTPUT:
    
New complete opacification of the left hemithorax , compatible with complete left lung collapse likely secondary to a mucus plug .