Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear without consolidation , nodules , or pulmonary edema . There is no pleural effusion or pneumothorax . The left hilum is prominent in comparison to the right . The cardiomediastinal silhouette is otherwise normal . Osseous structures are unremarkable without concerning lesions . There is no evidence of a compression fracture .
    OUTPUT:
    
1 . Prominent left hilum . Given the lack of pulmonary abnormalities on the recent PET - CT , this is likely a normal variant . If prior chest radiographs are available , comparison would be helpful to document stability . If further evaluation is clinically warranted , a CT of the chest could be obtained . 2 . No evidence of pulmonary nodules .