Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal and hilar contours are within normal limits . Sternal wires are intact . A right - sided pleural effusion has increased in size , now moderate . The left lung is clear . There is mild atelectasis at the right lung base . Thickening at the right apex corresponds to known right apical pleural - based mass as seen on prior PET - CT and CT examinations . There is no pneumothorax .
    OUTPUT:
    
Moderate right - sided pleural effusion , increased in size .