Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal and hilar contours remain stable . Again seen is a small to moderate right pleural effusion , difficult to compare to the prior study but grossly stable . There is no left pleural effusion , and there is no pneumothorax . Again seen is a nodular opacity in the lateral segment of the right middle lobe , corresponding to post - treatment changes , stable compared with the prior study . There is no new focal consolidation concerning for pneumonia . Pulmonary vasculature is within normal limits .
    OUTPUT:
    
Small to moderate right pleural effusion , grossly stable since the prior chest CT .