Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac silhouette size is normal . The mediastinal contour is unchanged . Mild enlargement of the hila bilaterally is compatible with underlying lymphadenopathy which was better demonstrated on the prior CT , and is unchanged . Regions of scarring within the right apex and left lung base appear relatively unchanged , with pleural thickening overlying the right apical lateral lung redemonstrated . Increased patchy opacities however are demonstrated in both lung bases . This could reflect atelectasis though infection can not be excluded . The pulmonary vascularity is normal . No pleural effusion or pneumothorax is identified . No acute osseous abnormalities are seen .
    OUTPUT:
    
Increasing patchy opacities in the lung bases are nonspecific , and could reflect areas of atelectasis though infection can not be excluded . Regions of scarring in the right apex and left lung base appear relatively unchanged .