Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A right - sided PICC ends in the mid SVC , unchanged . There is a new stent within the distal aspect of left mainstem bronchus . The distal trachea and carina are displaced toward the right due to a large esophageal mass , better evaluated on the prior CT from ___ . The lungs are clear . There are no pleural effusions . No pneumothorax . The heart size is normal .
    OUTPUT:
    
New stent in the distal aspect of the left mainstem bronchus . Conventional , rather than portable , radiographs would be better suited for any additional stent location followup .