Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . The patient is known to have a large hiatal hernia which is redemonstrated . The lungs appear clear without focal consolidation , effusion , or pneumothorax . The cardiomediastinal silhouette appears grossly stable . Bony structures are intact . No free air below the right hemidiaphragm .
    OUTPUT:
    
Large hiatal hernia . No evidence of pneumonia .