Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A 10 mm round opacity projecting over the right lower lobe may be the patient 's nipple , although a pulmonary nodule is not entirely excluded . The lungs are otherwise clear . The heart size is normal . The mediastinal contours are normal . There are no pleural effusions . No pneumothorax is seen .
    OUTPUT:
    
1 . No acute cardiac or pulmonary findings . 2 . 10 mm round opacity projecting over the right lower lung , possibly the nipple , although a pulmonary nodule can not be excluded . Further assessment with shallow oblique radiographs could be performed .