Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours appear stable . Nodular densities projecting over each lower lung correspond to nipples as confirmed by coinciding application of nipple markers . Oblique views are not included in this series . However , a third density is again faintly visualized on one of the included PA views . Otherwise , the lungs appear clear . There is no pleural effusion or pneumothorax . There is a mild rightward convex curvature to the thoracic spine with small multilevel osteophytes .
    OUTPUT:
    
Confirmation of bilateral nipple shadows , but persistent incompletely characterized nodular focus in the left upper lung . Oblique views were not performed for this study . Management alternatives include acquisition of oblique views to assess the third opacity versus consideration of chest CT .