Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is normal in size . The mediastinal and hilar contours are unremarkable . There is no pleural effusion or pneumothorax . There is a vague nodular focus projecting over the right lateral lung measuring about 8 mm in diameter . Otherwise the lungs appear clear .
    OUTPUT:
    
Vague nodular opacity projecting over the right mid lung , likely a nipple shadow , but confirmation with a repeat PA view with nipple markers is recommended when clinically appropriate . No evidence of acute disease .