Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiomediastinal silhouette , pulmonary vasculature , and aorta are within normal limits . There is unchanged blunting of the right costophrenic angle . A rounded rounded opacity projects over the posterior left tenth rib . There is no consolidation . There is no pneumothorax . Visualized osseous structures are unremarkable .
    OUTPUT:
    
1 . Rounded opacity projecting over the posterior left tenth rib may represent superimposed nipple shadow , however repeat PA radiograph with nipple marker is recommended for confirmation . 2 . Otherwise unremarkable chest radiographs .