Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size , mediastinal and hilar contours are within normal limits and without change . A subcentimeter well - circumscribed nodular opacity overlies the sixth left anterior rib level and is not clearly visualized on prior radiographs . Although potentially due to a nipple shadow , a small nodular opacity is also observed in the retrosternal region on the lateral view , raising the concern for a possible lingular lung nodule . Lungs are otherwise clear , and there are no pleural effusions . Postoperative changes are present in the cervical spine .
    OUTPUT:
    
Questionable lung nodule versus nipple shadow . Initial further evaluation with repeat radiograph with nipple markers is recommended , as communicated by telephone to Dr . ___ on ___ at 9 :09 a .m . at the time of discovery .