Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiomegaly is stable , otherwise the cardiomediastinal silhouette is unremarkable . There is no pleural effusion . The lungs are clear . Vertebral endplate sclerosis is seen .
    OUTPUT:
    
1 . Lungs are clear . 2 . Vertebral endplate sclerosis , raises the possibility of secondary parathyroidism .