Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest . There is pulmonary vascular engorgement and mild interstitial edema . There are small bilateral pleural effusions . In the left lower lobe , retrocardiac area , there is a heterogeneous opacity that may represent pneumonia . No pneumothorax . The cardiac and mediastinal contours are normal .
    OUTPUT:
    
1 . Mild pulmonary interstitial edema , pulmonary vascular congestion and small bilateral pleural effusions . 2 . Retrocardiac opacity may represent pneumonia .