Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is new near complete opacification of left hemithorax sparing a small portion of left lung apex . There is ipsilateral mediastinal shift . Right lung is clear . There is no pneumothorax or large right pleural effusion . Cardiac silhouette is obscured by left lung collapse . Tracheostomy tube and cervical spine fusion hardware are in unchanged position .
    OUTPUT:
    
New left lung near complete collapse with increased ipsilateral mediastinal shift . Finding may be due to migration of mucus plugging after referenced brochoscopy .