Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a retrocardiac opacity which is resulting in obscuration of the medial and posterior margin of the left hemidiaphragm , better assessed in the lateral view . There are small bilateral pleural effusions . There is no evidence of pulmonary edema . Moderate cardiomegaly is present , and heart size is significantly worsened compared with ___ when there was no cardiomegaly . Otherwise , mediastinal contour is unremarkable . There is no evidence of pneumothorax .
    OUTPUT:
    
Left lower lobe pneumonia . Cardiomegaly .