Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable AP upright chest radiograph ___ at 05 :57 is submitted .
    OUTPUT:
    
Interval appearance of mild perihilar and interstitial edema . Stable left - sided volume loss with elevation the diaphragm and shifted mediastinum status post median sternotomy . Previously described pulmonary nodules better seen on ste chest CT dated ___ are not well visualized due to the superimposed edema . Overall cardiac and mediastinal contours are unchanged . No pneumothorax . No large effusions .