Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A frontal portable chest radiograph demonstrates stable examination with increased density and irregular contour of the mediastinal and right suprahilar regions correlating with mediastinal mass evident on the ___ chest CT with distal right upper lobe opacification thought to represent post-obstructive pneumonia . There is widening of the distal trachea just above the level of the carina , 2 .7 cm compared to 1 .5 cm , consistent with placement of reportedly Y - shaped stent . The bronchial components of the stent are not visible radiographically . No other nodule is identified . No pneumothorax or pleural effusion present .
    OUTPUT:
    
Interval placement of Y - shaped tracheobronchial stent with visible patent tracheal portion . Bronchial limbs are not sufficiently radiopaque but appear grossly patent . Stable mediastinal / hilar contour irregularity and right upper lobe peripheral opacification consistent with known mass and associated post-obstructive pneumonia .