Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is normal in size . The mediastinal and hilar contours appear within normal limits . There is no pleural effusion or pneumothorax . The lung apices are somewhat obscured by overlying hair on the frontal view . Projecting over the course of the anterior right fifth rib as well as the right mid lung is a nodular focus , possibly a bone island or nipple shadow . Bony structures are unremarkable .
    OUTPUT:
    
1 . No evidence of acute cardiopulmonary disease . 2 . Small nodular focus projecting over the course of the right fifth rib and lung , nipple shadow versus bone island , although a pulmonary nodule is not excluded .