Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Subtle right upper lobe opacity may be due to overlap of structures versus a small pneumonia . No definite focal consolidation is seen elsewhere . No pleural effusion or pneumothorax is seen . The cardiac and mediastinal silhouettes are unremarkable . Nipple shadows are incidentally noted .
    OUTPUT:
    
Subtle right upper lobe opacity may be due to overlap of structures versus a small pneumonia .