Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lower lung opacity due to a combination of effusion and atelectasis now involves the entire left hemithorax suggestive of an increased large left pleural effusion . Two pleural pigtail catheters in the left lower hemithorax are unchanged in position . Increase in the left pleural effusion . There has not been much change in the position of the mediastinum probably due to associated left lung volume loss . Moderate right pleural effusion and right basilar atelectasis is similar . Upper lung is clear .
    OUTPUT:
    
Left pleural effusion has progressed over last two days . Two left pleural pigtail catheters are in unchanged position and moderate right pleural effusion and bibasilar atelectasis is unchanged .