Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is normal in size . The mediastinal and hilar contours appear within normal limits . There is a nodular focus of 8 mm in diameter projecting over the right mid lung as well as the anterior course of the right fifth rib , suggestive of a nipple shadow . The appearance is asymmetric but there is possibly also a vague nipple shadow on the left . Otherwise , the lung fields appear clear . There are no definite pleural effusions , but blunting of the right posterior costophrenic sulcus makes it difficult to exclude a tiny effusion . Aside from mild degenerative changes along the thoracic spine , bony structures are unremarkable .
    OUTPUT:
    
1 . No evidence of acute disease . 2 . Nodular focus projecting over the right lung suggesting a nipple shadow , but confirmation with an additional PA view with nipple markers is suggested when clinically appropriate .