Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Interval removal of a tracheal , right mainstem , and left mainstem a bronchus stent . The lung volumes are low bilaterally leading to crowding of the bronchovascular structures . There is no focal consolidation , pleural effusion , or pneumothorax identified . The cardiac silhouette is top normal in size .
    OUTPUT:
    
Status post tracheal stent without evidence of pneumothorax .