Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . There is no focal consolidation , effusion , or pneumothorax . The cardiomediastinal silhouette is normal . Mild prominence of the costochondral junction of the right first rib likely accounts for subtle nodularity at this level . Imaged osseous structures are intact . No free air below the right hemidiaphragm is seen .
    OUTPUT:
    
Subtle nodularity projecting over the right anterior first rib likely reflects costochondral junction calcification . If patient has elevated risk factors for malignancy consider CT to further assess .