Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . Hilar contours are unremarkable . Focal pulled along the left lateral aspect of the descending thoracic aortic contour at the level of the aortic hiatus is noted . The pulmonary vascularity is normal . Focal round hazy opacity is noted within the left mid lung field , concerning for pneumonia . Right lung is clear . No pleural effusion or pneumothorax is identified . There are no acute osseous abnormalities detected .
    OUTPUT:
    
1 . Rounded hazy opacity in the left mid lung field , concerning for pneumonia . 2 . Left lateral bulge along the descending thoracic aortic contour at the level of the aortic hiatus , of uncertain etiology . This could be further assessed with CT or MRI on a nonemergent basis .