Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Again seen are chronic interstitial changes predominantly in the right lower and left mid and lower lungs . However , there is increased density of opacification in the right lower hemithorax concerning for developing infection . Considerations include atypical infection , though asymmetric pulmonary edema is possible . Given history of lung malignancy , lymphangitic carcinomatosis is also a consideration . Underlying fibrotic changes are grossly similar with predominantly paramediastinal and lingular distribution . No pneumothorax or significant pleural effusion is seen . The heart size is enlarged , however , unchanged . Of note , on the CT of ___ , there was a small pericardial effusion . There are atherosclerotic calcifications of the aortic arch .
    OUTPUT:
    
Diffuse interstitial opacities increased predominantly in the right lower lung , concerning for developing infection . Given history of lung carcinoma , however , lymphangitic spread of carcinoma as well as asymmetric pulmonary edema are possibilities .