Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a nodular opacity projecting over the right lung base which is felt most likely to be a nipple shadow . The lungs are otherwise clear . The cardiomediastinal silhouette is within normal limits . There is no radiopaque foreign body nor may pneumomediastinum . Exuberant anterior osteophytes seen at the mid to lower thoracic spine .
    OUTPUT:
    
No radiopaque foreign body . Nodular opacity projecting over the right lung base most likely a nipple shadow .