Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal and hilar contours appear unremarkable . There is unchanged calcified atherosclerotic disease of the aortic knob with mild aortic tortuosity , unchanged compared to prior study . The lungs are clear . Of note , there is a poorly defined nodular density projected over the base of the right lung . There is no pleural or pericardial effusion . Clips are noted in the right axilla .
    OUTPUT:
    
Nodular opacity projected over the right base may represent an atypical nipple shadow , focal infection or malignant nodule . Recommend repeat CXR wtih nipple markers or CT for further evaluation .