Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiomediastinal contours are stable . Patient is status post right lower lobectomy . The lungs are clear . There is no pneumothorax . If any there is a small right effusion . There are mild degenerative changes in the thoracic spine .
    OUTPUT:
    
No acute cardiopulmonary abnormalities . Stable postsurgical appearance after right lower lobectomy .