Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Median sternotomy wires and mechanical aortic valve are unchanged in location . The small right - sided pleural effusion is stable compared to ___ . Pleural thickening at the right apex . The left lung is clear , without evidence of consolidations , pleural effusion or pneumothorax . The hila , mediastinum and heart are within normal limits . No acute osseous abnormalities .
    OUTPUT:
    
Stable small right - sided pleural effusion .