Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A left hilar and left infrahilar opacity corresponds to known lesions seen on CT examination of ___ . No new focal consolidation is seen to suggest pneumonia . No pleural effusion or pneumothorax is present . The heart size is normal . There is mild tortuosity of the aorta .
    OUTPUT:
    
1 . Known left perihilar as seen on prior CT examination . Other smaller lesions seen by CT are not well appreciated on this examination . 2 . No evidence of acute superimposed intrathoracic process .