Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Interval development of left hemi-thorax near complete opacification and leftward shift of mediastinal structures is consistent with near complete left lung collapse . The endotracheal tube remains 7 cm above the carina . Enteric tube appears in similar position . The left chest tube appears well - positioned with it s side port in the thoracic cavity . A right layering pleural effusion again noted .
    OUTPUT:
    
Interval development of near complete left lung collapse , likely due to mucous plugging .