Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Again demonstrated is a dialysis catheter terminating in the right atrium . Mild cardiomegaly is stable . There is mild interstitial and perihilar edema . No large effusions . No pneumothorax . The heart remains enlarged which may reflect cardiomegaly although pericardial effusion can not be entirely excluded .
    OUTPUT:
    
Mild perihilar and interstitial edema . Stable cardiac enlargement .