Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . The mediastinal and hilar contours are remarkable for a left cardiophrenic angle opacity , most likely due to a prominent pericardial fat pad and less likely a cyst or lipoma . . The pulmonary vasculature is normal . Lungs are hyperexpanded , consistent with history of asthma . Lungs are clear except for focal linear scar or atelectasis in the lingula . No pleural effusion or pneumothorax is seen . There are no acute osseous abnormalities .
    OUTPUT:
    
1 . No radiographic evidence of pneumonia . 2 . Left cardiophrenic angle opacity is most likely due to a prominent pericardial fat pad . Direct comparison to older radiographs would be helpful to document stability .