Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographs demonstrate sternal wires and a valve prosthesis , unchanged . There is a normal cardiomediastinal silhouette and well - aerated lungs without focal consolidation , pleural effusion , or pneumothorax . A nodular opacity projecting over the anterior sixth right rib likely represents a nipple shadow . The visualized upper abdomen is unremarkable .
    OUTPUT:
    
1 . No acute cardiopulmonary process . 2 . A nodular opacity projecting over the anterior right sixth rib is new compared to ___ , and likely represents a nipple shadow .