Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single frontal view of the chest was obtained . The patient has known paraseptal emphysema on prior chest CT . Background of chronic mild increased interstitial markings , with new opacities seen in the right mid - to - lower lung , worrisome for infection . There is also a moderate - to - large left pleural effusion with overlying atelectasis , underlying consolidation is not excluded . The cardiac silhouette is not enlarged . Mediastinal contours are stable .
    OUTPUT:
    
Moderate - to - large left pleural effusion with overlying atelectasis , underlying consolidation not excluded . Mid - to - lower lung opacity raises concern for pneumonia with background of chronic lung disease . There is also concern for superimposed component of pulmonary edema .