Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest were provided . There is interval mild increase in the bilateral pleural effusions with slight increase in bibasilar atelectasis . The right mid lung opacity is similar to prior exam and reflects post - treatment changes of a right middle lobe mass . There is no pneumothorax and there are no clear signs of pulmonary edema . The heart size can not be assessed . Mediastinal contour is stable . Bony structures are intact .
    OUTPUT:
    
Mild increase in bilateral pleural effusions with bibasilar atelectasis , also slightly progressed .