Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable semi-erect chest film ___ at 09 :06 is submitted .
    OUTPUT:
    
The heart remains stably enlarged which may reflect cardiomegaly , although pericardial effusion should also be considered . Mediastinal contours are unchanged . There is stable mild perihilar and interstitial edema . No large effusions . No pneumothorax .