Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest were provided . Postoperative changes in the mediastinum relate to prior gastric pull - through and esophagectomy . There are subtle lower lung opacities noted bilaterally , which appear new from prior exam and could represent a very early pneumonia versus atelectasis . No overt signs of pulmonary edema . No effusion or pneumothorax . Overall , cardiomediastinal silhouette is stable . Clips in the mediastinum noted . Bony structures are intact .
    OUTPUT:
    
Stable postoperative changes with vague lower lung opacities , which could represent pneumonia in the correct clinical setting .