Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Prominence of right infrahilar bronchovascular structures appears unchanged and is a fairly typical appearance when a pectus deformity is present . Mild biapical pleural scarring is unchanged . The lungs appear clear . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
No evidence of acute disease . Severe pectus excavatum .