Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Slightly prominent left infrahilar region with preservation of air bronchograms , which appears more prominent compared to the exam earlier today . Otherwise , the lungs are clear . No pneumothorax or pleural effusion . The cardiomediastinal silhouette , hila , and pleura are normal and unchanged from the prior exam . No acute osseous abnormality . Incidental interposition of the right colon between the right diaphragm and liver . No intra-abdominal sub - diaphragmatic free air .
    OUTPUT:
    
1 . Slight prominence of the left infrahilar region , increased from the prior exam . In the appropriate clinical setting , this could represent a developing pneumonia or atelectasis . 2 . Incidental interposition of the right colon between the diaphragm and liver , most likely from Chilaiditi syndrome , although no lateral view is available .