Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal radiograph of the chest when compared to the prior radiograph shows interval worsening of opacification at the bases owing to basilar atelectasis . This could represent developing pneumonia in the appropriate clinical situation . There persists a small right pleural effusion . No left pleural effusion is seen . No pneumothorax is seen . The cardiac and mediastinal contour is mildly enlarged , but unchanged from the prior radiographs . Of note , there is persistent narrowing of the tracheal air column , raising the concern for tracheal stenosis .
    OUTPUT:
    
1 . Interval worsening of bibasilar opacities concerning for pneumonia or bibasilar atelectasis . 2 . Possible tracheal stenosis . Recommend PA and lateral views when the patient is able to tolerate this .