Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is thickening of the bilateral peritracheal stripe is in the upper mediastinum compatible with the patient 's known thyroid mass . The trachea is narrowed at this level appear the cardiac silhouette is normal in size . The hilar contours are within normal limits . Minimal calcification of the aortic knob is noted . Streaky opacities in the bilateral lung bases may reflect atelectasis ; however , aspiration or pneumonia is not excluded . There is increase density projecting over the lower thoracic spine on the lateral view . No significant pleural effusion or pneumothorax is detected . The pulmonary vasculature is not engorged and there is no overt pulmonary edema .
    OUTPUT:
    
1 . Streaky opacities in the bilateral lung bases may reflect atelectasis ; however , aspiration or pneumonia is not excluded . 2 . Thickening of the bilateral paratracheal stripes corresponding to known thyroid mass .