Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Chest , PA and lateral radiographs demonstrate unremarkable mediastinal and hilar contours . Heart size is normal . Faint rounded opacity is identified projecting over the left lateral border of the heart may represents nipple shadow . However , there appears to be a somewhat nodular density in the breast on the lateral views which appears deep to the nipple . No opacification concerning for pneumonia identified . No pleural effusion or pneumothorax evident . No osseous abnormality identified , though multilevel degenerative changes are present .
    OUTPUT:
    
Nodular density projecting over the left lateral border the heart of unclear etiology may correspond with a nodular density that appears deep to the nipple within the left breast on lateral view . While finding could relate to the nipple , there may be a density deeper to it . Please correlate with mammography . Mammogram from ___ does not demonstrate a nodular density in the left breast .