Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A Port - A - Cath terminates in the superior vena cava , similar to prior findings . Surgical clips project over the right breast . The right lung remains clear but there is increasing opacification of the left hemithorax , probably for the most part associated with increase in a suspected large pleural effusion on that side . Previously there was a small hydropneumothorax that is no longer apparent .
    OUTPUT:
    
Increased opacification of the left hemithorax suggesting primarily increase in pleural effusion .