Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographs demonstrate a large hiatal hernia with air - fluid level minimally increased in size when compared to radiograph dated ___ . Although limited by presence of hiatal hernia , the lungs appear grossly clear with no focal consolidation . There is adjacent left lower lobe atelectasis . No appreciable pleural effusion or pneumothorax is identified . The cardiomediastinal and hilar contours are within normal limits .
    OUTPUT:
    
Large hiatal hernia minimally increased in size when compared to chest radiograph dated ___ . To better characterize the hiatal hernia , a CT of the abdomen or barium swallow may be performed .