Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is mildly enlarged . Mediastinal contours normal . There is no large pleural effusion or pneumothorax . There is no overt pulmonary edema . Right lower lobe opacity corresponding to known lesion , has not significantly changed from prior .
    OUTPUT:
    
1 . Mild cardiomegaly . No overt pulmonary edema . 2 . Focal opacity in the right lower lobe corresponding to known mass .