Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are hyperexpanded . Ill - defined interstitial opacities are most prominent in both upper lungs , increased from ___ . Mediastinal contours , and hila are overall unchanged . Cardiac silhouette is larger than in ___ . There is no pleural effusion pneumothorax .
    OUTPUT:
    
Extensive interstitial opacities may reflect pulmonary edema or worsening underlying sarcoid lung disease , although it is difficult to exclude infection in the right clinical setting . No pneumothorax .