Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral upright radiographs of the chest were obtained . The vascular stent in the superior vena cava is unchanged in appearance . Top normal heart size and mediastinal contours are unchanged . Mild tortuosity of the thoracic aorta is stable . No focal consolidation , pleural effusion or pneumothorax . An oval ___ x 8 mm opacity projects over the ___ right posterior rib unchanged dating back to at least ___ corresponding to a sclerotic lesion in the 7th rib on CT , likely a bone island .
    OUTPUT:
    
No evidence of pneumonia