Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours appear within normal limits . There is no definite pleural effusion or pneumothorax . The lungs appear clear . The bones appear demineralized . There is a mild reverse S - shaped curvature to the thoracic spine and mild degenerative changes . A vertebral body at or near the thoracolumbar junction demonstrates a moderate biconcave compression deformity .
    OUTPUT:
    
No definite evidence of recent injury . Biconcave moderate compression deformity of a thoracolumbar vertebral body , although not necessarily of recent chronicity ; correlation with physical findings is suggested .