Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . In the left lung base , there is a small to moderate amount of loculated pleural effusion , which is stable to possibly minimally decreased in size since prior study . Air is seen within this loculated collection , better seen on CT , which may be due to recent PleurX catheter removal . In addition , there is increased opacity in the left upper hemithorax , which is not well seen in the prior study and could reflect additional loculated fluid collection . No free air below the right hemidiaphragm is seen .
    OUTPUT:
    
1 . Left lung base loculated pleural effusion is stable in size , however there is new air seen within this collection concerning for a small pneumothorax , which may be related to recent pleural catheter removal . 2 . New opacity in the left upper hemithorax , concerning for possible additional loculated fluid collection .