Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: No change in the position of the bilateral pigtail catheters . Compared with the prior radiograph , increased opacification at the left lower lung may be due to developing pneumonia in the correct clinical setting or a larger left pleural effusion . No larger right pleural effusion . Moderate cardiomegaly is unchanged . No pneumothorax .
    OUTPUT:
    
Increased opacification of the left lower lung may be due to developing pneumonia , in the correct clinical setting , or a larger left pleural effusion . No larger right pleural effusion .