Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours appear unchanged . A small lung nodule projecting over the left upper lobe appears unchanged since the prior examinations . Otherwise , the lungs appear clear . There are no pleural effusions or pneumothorax . Bony structures are unremarkable .
    OUTPUT:
    
Stable small suspected pulmonary nodule projecting over the left upper lobe .