Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac silhouette is upper limits of normal in size . A large hiatal hernia is present , it was not previously visible on the older chest radiograph , but has been described on the barium esophagram from ___ . Lungs are clear except for a small focus of linear scar in the retrosternal region on the lateral view , corresponding to either the middle lobe or lingula . There are no pleural effusions . Bones are diffusely demineralized .
    OUTPUT:
    
Large hiatal hernia . No acute cardiopulmonary radiographic abnormality .