Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac silhouette remains massively enlarged . The mediastinal and hilar contours are unremarkable . There is no pleural effusion or pneumothorax . The lungs are well expanded . Slight increased haziness of the left lung base is noted , which may reflect an acute infectious process . Pulmonary vascularity is within normal limits . Air distended loops of bowel in the upper abdomen are noted , similar to the prior exam . No acute osseous abnormality is detected .
    OUTPUT:
    
1 . Increased hazy opacity at the left base , which may reflect an infectious process . 2 . Stable massively enlarged cardiac silhouette .