Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left pigtail pleural catheter remains in place in the lower left hemithorax , but a moderate - to - large partially loculated pleural effusion has increased in size since the previous study . Additionally , there is a suggestion of a tiny pneumothorax at the left lung apex . New airspace opacities are present in the left perihilar region , and could reflect reexpansion edema considering that the prior study was obtained immediately after placement of pigtail catheter with associated large reduction in volume of left pleural effusion . Persistent blunting of right lateral costophrenic sulcus consistent with small pleural effusion . Adjacent patchy opacity at right base may reflect atelectasis or early pneumonia .
    OUTPUT:
    
Enlarging loculated left pleural effusion . Left perihilar airspace opacity , possibly due to reexpansion edema considering recent large volume reduction in pleural fluid one day earlier .