Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The NG tube ends above the diaphragm overlying the retrocardiac opacity which is presumed to be the known hiatal hernia . The lungs are clear without consolidation or edema . There is no pleural effusion or pneumothorax . Mild enlargement of the cardiomediastinal silhouette is stable .
    OUTPUT:
    
NG tube ends above the diaphragm , presumably within the hiatal hernia .