Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal silhouette is normal . There is no pleural effusion or pneumothorax . The lungs are clear . Views of the upper abdomen are unremarkable . Mild loss of vertebral body height in the lower thoracic spine is unchanged , and of uncertain etiology .
    OUTPUT:
    
Unchanged mild loss of disc height of multiple lower thoracic vertebral bodies , otherwise normal chest radiograph .