Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is little change compared to prior examination with redemonstration of significant cardiomegaly and postoperative mediastinal contour . A central vascular congestion with upper zone redistribution is again noted without frank interstitial edema . There is redemonstration of a retrocardiac consolidation which obscures the left hemidiaphragm . A right - sided PICC terminates in the low SVC . There is no large effusion or pneumothorax .
    OUTPUT:
    
Retrocardiac consolidation which may be atelectasis or pneumonia . Conventional lateral view may be helpful for further evaluation . Vascular congestion without frank edema .