Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is normal . The hilar and mediastinal contours are unremarkable . There are bilateral coarse irregular lung markings likely secondary to COPD . There is also a minimal left basilar opacity . There is no evidence of pneumothorax or pleural effusions .
    OUTPUT:
    
1 . Coarse irregular lung markings bilaterally , likely secondary to COPD . 2 . Minimal left basilar opacity may be secondary to subtle pneumonia ; short - term follow - up chest x-ray may be helpful to reassess .