Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal and hilar contours remain stable with moderate cardiomegaly . Retrocardiac opacity remains stable compared to yesterday and may represent atelectasis or pneumonia . Lateral radiograph was not obtained for further assessment . There is no other focal consolidation concerning for pneumonia .
    OUTPUT:
    
Stable left basilar atelectasis or pneumonia .