Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Rounded densities projecting over the lung bases likely represent nipple shadows . The lung fields are otherwise clear . Cardiomediastinal silhouette is unremarkable .
    OUTPUT:
    
AT NIPPLE SHADOW SHOULD NOT BE MISTAKEN FOR LUNG NODULES . PREVIOUS ___ NOTED THE LEFT LOWER LOBE ___ NODULE ON THAT CHEST CT IN ___ DOES NOT REQUIRE FOLLOW - UP .