Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is mildly enlarged , unchanged . Mediastinal and hilar contours are within normal limits . Pulmonary vasculature is normal . Lung volumes are low with unchanged small right pleural effusion . There is no focal consolidation or pneumothorax . No acute osseous abnormalities demonstrated . No displaced fractures are visualized .
    OUTPUT:
    
Small right pleural effusion .