Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a small right pleural effusion with associated atelectasis . There is no pulmonary vascular congestion or pneumothorax . The heart size is normal . The mediastinal and hilar contours are within normal limits .
    OUTPUT:
    
Small right pleural effusion with associated atelectasis . An underlying pneumonia is possible in the proper clinical setting .