Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is increased opacity in the right lung base , likely a combination of moderate pleural effusion and associated consolidation . Findings may reflect atelectasis though aspiration or pneumonia are also within the differential given the clinical history . The remainder of the lungs appear clear . There is no vascular congestion or overt edema . Mediastinal and hilar contours are within normal limits . Evaluation of the cardiac size is limited due to basilar opacity . No pneumothorax is evident . Degenerative changes of the bilateral shoulder joints are noted .
    OUTPUT:
    
Right lung base opacity , likely a combination of effusion and consolidation . Aspiration or pneumonia are within the differential .