Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal and hilar contours are normal . There is mild blunting of the left costophrenic angle , which may represent scarring or small pleural effusion . There is rightward shift of the anterior junction line suggestive of bullae in the left upper lobe . Otherwise , lungs are clear .
    OUTPUT:
    
1 . No focal consolidation to suggest pneumonia . 2 . Probable left upper lobe bullae . 3 . Left costophrenic angle blunting which may represent scarring or small pleural effusion . If symptoms persist , repeat conventional chest radiography supplemented by oblique views may be obtained in several weeks .