Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post left pneumonectomy . There is a large residual associated air-fluid level in the left hemithorax , but probably unchanged , and overall there is volume loss with leftward shift of mediastinal structures . Moderately extensive subpleural scarring at the right lung apex appears stable . There is no new focal opacity . There is no pleural effusion on the right . Contrast is visualized along the splenic flexure of the colon . There is no free air .
    OUTPUT:
    
Stable post-operative findings .