Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a rounded opacity measuring approximately 1 .2 cm in the right upper lung , projecting over the fifth posterior rib . Otherwise , the lungs are well expanded and clear . No pleural abnormality is seen . The hilar and mediastinal silhouettes are unremarkable .
    OUTPUT:
    
Rounded opacity projecting over the right upper lung , likely due to an external structure on the skin surface . Repeat radiograph with removal of all surface objects is recommended .