Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status - post a gastric - pull up for esophageal cancer . A large bubble of air overlying the right hemithorax is air within the thoracic portion of the stomach . There is no evidence of pneumomediastinum or pneumothorax . A small linear right basilar opacity likely reflects chronic atelectasis . The lungs are otherwise clear . There is no new opacity , pulmonary edema , pleural effusion , or pneumothorax . The cardiomediastinal silhouette is normal .
    OUTPUT:
    
No evidence of pneumomediastinum or pneumothorax .