Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size , mediastinal and hilar contours are stable in appearance compared to the prior study . Prominence of the left hilar contour may be rotational in the setting of scoliosis , and is in fact unchanged dating back to ___ . Lungs are clear , and there are no pleural effusions . Scoliosis is again demonstrated .
    OUTPUT:
    
Stable radiographic appearance of the chest , with no evidence of pneumonia .