Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The left hilum is slightly larger than expected . There has been however , no appreciable change in the left hilum since baseline study from ___ . The cardiomediastinal silhouette is normal . The lungs are well expanded and clear . There are no pleural effusions or pneumothorax . The osseous structures are unremarkable .
    OUTPUT:
    
No radiographic evidence of an acute cardiopulmonary process . Stable appearance of the left hilum since ___ .