Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . There is a large left pleural effusion with significant collapse of the left upper and lower lobe . There is no significant shift of midline structures . The right lung is clear . Heart size can not be assessed . Bony structures appear intact .
    OUTPUT:
    
Large left pleural effusion with associated collapse of the left lower lobe and portions of the left upper lobe . Thoracentesis is advised .