Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable semi-upright radiograph of the chest demonstrates near complete opacification of the left hemithorax which likely represents a combination of pleural effusion and adjacent atelectasis . There is no major shift of the mediastinum . Over the interval , there has been slight increase in the right - sided pleural effusion , which is still small . A right IJ central venous line is seen with the tip terminating in the distal SVC .
    OUTPUT:
    
Near - complete opacification of the left hemithorax indicates enlarging pleural effusion with adjacent atelectasis .