Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP and lateral views of the chest . Previously seen bulging left lower lateral mediastinal contour is consistent with a moderate hiatal hernia . There is no focal consolidation , pleural effusion or pneumothorax . The heart size is normal . The mediastinal and hilar contours are unchanged .
    OUTPUT:
    
Previously seen bulging left lower lateral mediastinal contour is consistent with a moderate hiatal hernia . No acute cardiopulmonary process .