Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared with chest radiographs on ___ , patient has undergone interval esophageal dilation . There is no pneumothorax or pneumomediastinum . The lungs are clear , with no focal consolidation , pleural effusion , or edema . Note is made of 6cm of narrowing and irregular contour of the trachea at the thoracic inlet , not significantly changed from prior but of uncertain etiology . Heart size is within normal limits .
    OUTPUT:
    
1 . No pneumothorax or pneumomediastinum . 2 . Note is made irregular contour of the trachea , with an area of change of contour of the trachea , not significantly changed from previous . This was communicated with Dr . ___ ___ the surgery team , and patient has a known tracheal stricture secondary to lye ingestion .