Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Moderate cardiomegaly is unchanged from prior study . Mediastinal silhouette and hilar contours are stable . A small left - sided effusion with adjacent atelectasis is unchanged from prior examination . There is subtly increased heterogeneous density in the right lung base with corresponding with increased retrocardiac opacity on lateral view suspicious for pneumonia . Subpleural scarring in the mid left lung field is unchanged . There is no frank interstitial pulmonary edema . There is no pneumothorax .
    OUTPUT:
    
Subtle heterogeneous increased density in the right lung base with retrocardiac lateral correlate suspicious for pneumonia .