Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are hyperinflated and demonstrate diffuse bronchiectasis and peribronchial wall thickening , findings consistent with COPD . A left basilar opacity is of uncertain etiology . Though atelectasis and pneumonia should be considered , scarring is also a possibility given the adjacent tenting of the left hemidiaphragm . No pneumothorax is evident . There is no pulmonary edema . there is a possible small left pleural effusion . Cardiomediastinal and hilar contours are within normal limits .
    OUTPUT:
    
1 . Hyperinflation and bronchiectasis related to COPD 2 . Left basilar opacity is of uncertain etiology . Atelectasis , pneumonia or scarring are possible .